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Author Callebaut, A.K.; Michel, K.H.
  Title Microscopic theory of orientational disorder and lattice instability in solid C70 Type A1 Journal article
  Year 1995 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
  Volume 52 Issue 21 Pages 15279-15290
  Keywords A1 Journal article; Condensed Matter Theory (CMT)
  Abstract (down) We have developed a microscopic theory which describes the orientational dynamics of C-70 molecules and its coupling to lattice displacements in the face-centered-cubic phase of C-70 fullerite. The single-molecule orientational density distribution in the disordered phase is calculated. The ferroelastic transition to the rhombohedral phase is investigated. The discontinuity of the orientational order parameter at the phase transition is calculated. It is found that the transition leads to a stretching of the primitive unit cell along a [111] cubic direction. A softening of the elastic constant c(44) at the transition is predicted.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Lancaster, Pa Editor
  Language Wos A1995TK97900042 Publication Date 2002-07-27
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0163-1829;1095-3795; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 3.736 Times cited 20 Open Access
  Notes Approved PHYSICS, APPLIED 28/145 Q1 #
  Call Number UA @ lucian @ c:irua:104421 Serial 2031
Permanent link to this record
 

 
Author Shpanchenko, R.V.; Nistor, L.; Van Tendeloo, G.; van Landuyt, J.; Amelinckx, S.
  Title Structural studies on new ternary oxides Ba8Ta4Ti3O24 and Ba10Ta7.04Ti1.2O30 Type A1 Journal article
  Year 1995 Publication Journal of solid state chemistry Abbreviated Journal J Solid State Chem
  Volume 114 Issue 2 Pages 560-574
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) The ternary oxides Ba8Ta4Ti3O24 and Ba10Ta7.04Ti1.2O30 were synthesized and their crystal structures and defects were studied by means of X-ray powder diffraction, electron diffraction, and high resolution electron microscopy. The crystal structure of Ba8Ta4Ti3O24 is based on the 8H (cchc)(2) close-packed stacking (a 10.0314 Angstrom, c = 18.869 Angstrom, SG P6(3)/mcm, Z = 3) and that of Ba10Ta7.04Ti1.2O30 and on the 10H (cchcc)(2) close-packed stacking (a = 5.7981 Angstrom, c = 23.755 Angstrom, SG P6(3)/mmc, Z = 1) of BaO3 layers. The structural refinements gave the following values for the R factors for Ba8Ta4Ti3O24 (Ba10Ta7.04Ti1.2O30) R(I) = 0.041 (0.039), R(P) = 0.108 (0.118), and R(wP) = 0.094 (0.099). The main feature of both structures is the presence of two types of face-sharing octahedra (FSO) with different occupancies by Ta atoms, Ti atoms, and vacancies, which results in the formation of a superstructure. It was shown that in the Ba8Ta4Ti3O24 structure these pairs of FSO occur in an ordered fashion and in the Ba10Ta7.04Ti1.2O30 structure in a disordered fashion. The existence of the wide range of solid solutions was shown to be also a consequence of the presence of one of the two types of face-sharing octahedra. (C) 1995 Academic Press, Inc,
  Address
  Corporate Author Thesis
  Publisher Place of Publication London Editor
  Language Wos A1995QH33100040 Publication Date 2002-10-07
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0022-4596; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.133 Times cited 23 Open Access
  Notes Approved
  Call Number UA @ lucian @ c:irua:13289 Serial 3261
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Author Milat, O.; Van Tendeloo, G.; Amelinckx, S.; Wright, A.J.; Greaves, C.
  Title Effect of the substitution Ba\leftrightarrow Sr on the Ga-1222 superstructure : an electron diffraction study Type A1 Journal article
  Year 1995 Publication Chemistry of materials Abbreviated Journal Chem Mater
  Volume 7 Issue 9 Pages 1709-1715
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) The superstructure of the RE(2)(Sr0.85-xBaxNd0.15)(2)GaCU2O9 compound is found to change significantly with increasing substitution of Ba for Sr. Most of the changes take place in the (Sr0.85-xBaxNd0.15)O-GaO-(Sr0.85-xBaxNd0.15)O lamella, the rest of the basic structure being hardly affected. The structural changes for O less than or equal to x less than or equal to 0.65 are studied by electron diffraction. The arrangement of the chains of GaO4 tetrahedra in the Ba-free compound becomes disordered at x > 0.25. At x similar to 0.65 a rearrangement of the chains in the GaO layers takes place; they form a meandering arrangement, which can be described on a 4a(p) x 2a(p) x c(p) superlattice. This rearrangement is accompanied by ordering of Ba and Sr atoms in the adjacent (ST0.85-xBaxNd0.15)O layers. A simple scheme is proposed to explain the influence of the substitution of Ba for Sr on the linking of the GaO4 tetrahedra and on the geometry of the ''chains'' in the GaO layer.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Washington, D.C. Editor
  Language Wos A1995RW21200021 Publication Date 2005-03-08
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0897-4756;1520-5002; ISBN Additional Links UA library record; WoS full record
  Impact Factor 8.354 Times cited Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:13326 Serial 850
Permanent link to this record
 

 
Author Schryvers, D.
  Title Martensitic and related transformations in Ni-Al alloys Type A1 Journal article
  Year 1995 Publication Journal de physique: 4 T2 – IIIrd European Symposium on Martensitic Transformations (ESOMAT 94), SEP 14-16, 1994, BARCELONA, SPAIN Abbreviated Journal IIIrd European Symposium on Martensitic Transformations (ESOMAT 94), SEP 14-16, 1994, BARCELONA, SPA
  Volume 5 Issue C2 Pages 225-234
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) The present paper gives a review of results of recent studies investigating the fundamentals of the martensitic and related phase transformations in Ni-Al. For the former case, the emphasis will be on the microstructure of martensite plates. The latter include the metastable Ni2Al omega-like and stable Ni5Al3 bainitic phases. These phases will be discussed in view of their atomic structure, nucleation, growth and effect on the martensitic transformation. A separate chapter will deal with precursor effects.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Les Ulis Editor
  Language Wos A1995QX40700036 Publication Date 2007-07-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited 21 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:104437 Serial 1947
Permanent link to this record
 

 
Author De Meulenaere, P.; Van Tendeloo, G.; van Landuyt, J.; van Dyck, D.
  Title On the interpretation of HREM images of partially ordered alloys Type A1 Journal article
  Year 1995 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 60 Issue 2 Pages 265-282
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
  Abstract (down) The ordering for 11/20 alloys has been studied by high-resolution electron microscopy (HREM). The distribution of the intensity maxima in the HREM image have been statistically examined, which provides a profound basis for the image interpretation. Processing of the HREM images allows ''dark-field'' images to be obtained, exhibiting a two-dimensional distribution of those columns which contain the most information in order to interpret the short-range order correlations. Pair correlations and higher cluster correlations between projected columns can be visualised, providing unique information about the ordering as retrieved from an experimental result without any other assumption. The method has been applied to Au4Cr and to Au4Mn to interpret the quenched short-range order state and the transition to long-range order.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Amsterdam Editor
  Language Wos A1995TZ14700008 Publication Date 2002-07-25
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0304-3991; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.436 Times cited 20 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:13014 Serial 2438
Permanent link to this record
 

 
Author Schryvers, D.; Toth, L.; Ma, Y.; Tanner, L.
  Title Nucleation and growth of the Ni5Al3 phase in Ni-Al austenite and martensite Type A1 Journal article
  Year 1995 Publication Journal de physique: 4 T2 – IIIrd European Symposium on Martensitic Transformations (ESOMAT 94), SEP 14-16, 1994, BARCELONA, SPAIN Abbreviated Journal IIIrd European Symposium on Martensitic Transformations (ESOMAT 94), SEP 14-16, 1994, BARCELONA, SPA
  Volume 5 Issue C2 Pages 299-304
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) The nucleation and growth mechanisms of Ni5Al3 precipitates and microtwinned plates in B2 austenite and 2M (3R) martensite phases are described on the basis of conventional and high resolution electron microscopy. In the Ni62.5Al37.5 B2 austenite matrix short annealings at 550 degrees C introduce three-pointed star shaped precipitates consisting of twin related parts of different variants of the Ni5Al3 structure. Longer annealings result in plates growing separately from these wings and developing microtwinning in order to accommodate stress built-up at the interfaces with the surrounding matrix. Annealing of Ni65Al35 2M martensite plates induces simple reordering into the Ni5Al3 phase, increasing the fct c/a ratio by about 1%. As a result stracking faults are introduced in the smallest twin variants.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Les Ulis Editor
  Language Wos A1995QX40700047 Publication Date 2007-07-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited 3 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:104438 Serial 2387
Permanent link to this record
 

 
Author Smondyrev, M.A.; Vansant, P.; Peeters, F.M.; Devreese, J.T.
  Title Nonlinear Schrödinger equation on a circle Type A1 Journal article
  Year 1995 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
  Volume 52 Issue 15 Pages 11231-11237
  Keywords A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems
  Abstract (down) The nonlinear Schrodinger equation is solved on an infinitesimal thin ring or circle. We obtained the exact real wave functions with their corresponding energies for the ground state and the excited states. Critical values of the circle perimeter are found at which the ground state changes its structure and additional higher excited states appear. Also, the complex wave functions that correspond to energy levels with finite angular momentum are studied.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Lancaster, Pa Editor
  Language Wos A1995TA85200087 Publication Date 2002-07-27
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0163-1829;1095-3795; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 3.736 Times cited 5 Open Access
  Notes Approved PHYSICS, APPLIED 47/145 Q2 #
  Call Number UA @ lucian @ c:irua:11697 Serial 2356
Permanent link to this record
 

 
Author Van Tendeloo, G.; Hervieu, M.; Zhang, X.F.; Raveau, B.
  Title Ordering principles and defect structure of “1201”, “1212”, and “1222” type (Hg,Pr)-Sr-(Sr,Ca,Pr)-Cu-O superconductors Type A1 Journal article
  Year 1995 Publication Journal of solid state chemistry Abbreviated Journal J Solid State Chem
  Volume 114 Issue 2 Pages 369-378
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) The new families of superconducting compounds ''1201'' (Hg0.4Pr0.6Sr2CuO4+delta), ''1212'' (Hg0.4Pr0.6Sr2(Ca1-x-ySrxPry) Cu2O6+delta), and ''1222'' (Hg0.4Pr0.6Sr2(Pr1.7Sr0.3)(2)Cu2O8+delta) all show ordering between praseodymium and mercury in the (Hg,Pr)O-delta plane, reducing the symmetry from tetragonal to orthorhombic or even to monoclinic. In the 1201 compound the ordered superstructure can be described as O-I (a(I) approximate to 2a(p), b(I), approximate to a(p), c(I) approximate to c(1201)). In the 1212 compound two distinct superstructures are identified, O-I (a(I) approximate to 2a(p), b(II) approximate to a(p), c(I) approximate to c(1212)) and O-II (a(II) approximate to 2a(p), b(II) approximate to a(p), c(II) approximate to 2c(1212)). In some compounds, such as Hg0.4Pr0.6Sr2(Ca0.4Sr0.4Pr0.2) Cu2O6+delta, the Hg-Pr ordering is only present in microdomains, but due to an ordering between Sr layers and Ca layers, the c-axis doubles and one obtains a tetragonal superstructure T-III (a(III) approximate to a(p), c(III) approximate to 2c(1212)). In the 1222 compound, ordering in the (Pr,Hg)O-delta plane is very defective; a large number of translation defects actually reduce the symmetry to triclinic. (C) 1995 Academic Press, Inc.
  Address
  Corporate Author Thesis
  Publisher Place of Publication London Editor
  Language Wos A1995QH33100011 Publication Date 2002-10-07
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0022-4596; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.133 Times cited 11 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:13308 Serial 2508
Permanent link to this record
 

 
Author Vasiliev, A.L.; Van Tendeloo, G.; Boikov, Y.; Olsson, E.; Ivanov, Z.; Claeson, T.; Kiselev, N.A.
  Title Structural aspects of the combination of Si and YBa2Cu3O7-x Type A1 Journal article
  Year 1995 Publication Institute of physics conference series Abbreviated Journal
  Volume 146 Issue Pages 333-336
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) The microstructure of defects and interfaces as well as interfacial reactions of the YBa2Cu3O7-x (YBCO) thin films on Si or Si on sapphire with single Y-stabilized ZrO2 (YSZ), double CeO2/YSZ or triple MgO/CeO2/YSZ buffer layer has been characterized by transmission electron microscopy The complex buffer made it possible to prevent detrimental interdiffusion and to control the orientation of YBCO layers.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos A1995BE73Q00070 Publication Date 0000-00-00
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0951-3248 ISBN Additional Links UA library record; WoS full record;
  Impact Factor Times cited Open Access
  Notes Approved
  Call Number UA @ lucian @ c:irua:95922 Serial 3211
Permanent link to this record
 

 
Author Hai; Studart; Peeters, F.M.
  Title Electron-mobility in 2 coupled delta-layers Type A1 Journal article
  Year 1995 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
  Volume 52 Issue 15 Pages 11273-11276
  Keywords A1 Journal article; Condensed Matter Theory (CMT)
  Abstract (down) The low-temperature transport properties are studied for electrons confined in delta-doped semiconductor structures with two sheets in parallel. The subband quantum mobility and transport mobility are calculated numerically for the Si delta-doped GaAs systems. The effect of coupling of the two delta layers on the electron transport is investigated. Our calculations are in good agreement with experimental results.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Lancaster, Pa Editor
  Language Wos A1995TA85200092 Publication Date 2002-07-27
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0163-1829;1095-3795; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 3.736 Times cited 25 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:95343 Serial 976
Permanent link to this record
 

 
Author Hai; Studart; Peeters, F.M.
  Title Multisubband electron-transport in delta-doped semiconductor systems Type A1 Journal article
  Year 1995 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
  Volume 52 Issue 11 Pages 8363-8371
  Keywords A1 Journal article; Condensed Matter Theory (CMT)
  Abstract (down) The electron transport properties in delta-doped semiconductor systems-are studied. The subband electronic structure of the delta-doped system is obtained by solving the coupled Schrodinger and Poisson equations. The screening of the quasi-two-dimensional electron gas is taken into account for the ionized impurity scattering through the matrix dielectric function within the random-phase approximation. The quantum and transport mobilities are calculated numerically as a function of the total electron density and the width of the doped layer at zero temperature. The intersubband scattering and the effect of empty subbands above the Fermi level on the electron mobilities are investigated. The calculated mobilities are in reasonable agreement with the available experimental results.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Lancaster, Pa Editor
  Language Wos A1995RV81800091 Publication Date 2002-07-27
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0163-1829;1095-3795; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 3.736 Times cited 67 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:95353 Serial 2243
Permanent link to this record
 

 
Author Radaelli, P.G.; Marezio, M.; Tholence, J.L.; Debrion, S.; Santoro, A.; Huang, Q.; Capponi, J.J.; Chaillout, C.; Krekels, T.; Van Tendeloo, G.
  Title Crystal-structure of the double-hg-layer copper-oxide superconductor (Hg,Pr)2Ba2(Y,Ca)Cu2O8-\deltaas a function of doping Type A1 Journal article
  Year 1995 Publication The journal of physics and chemistry of solids Abbreviated Journal J Phys Chem Solids
  Volume 56 Issue 10 Pages 1471-1478
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) The crystal structure of the newly discovered double-Hg-layer copper oxide superconductor (Hg, Pr)(2)Ba-2(Y, Ca)Cu2O8-delta was studied as a function of chemical doping using neutron and electron diffraction and high-resolution transmission electron microscopy (HREM). Rietveld refinements of the structural parameters from neutron powder diffraction data indicate that the oxygen site O3 on the mercury plane is highly defective, being both partially occupied and displaced from the high-symmetry position. The variable concentration of oxygen vacancies partially compensates for the cation doping and, together with the O3 displacement field, makes some of the Hg atoms acquire an unusual pyramidal coordination. HREM images confirm that the structure is of the '2212' type, with very few defects. In some grains, faint superstructure reflections were evidenced by electron diffraction, suggesting that both the oxygen vacancies and the O3 displacement field may order at least on a local scale.
  Address
  Corporate Author Thesis
  Publisher Place of Publication New York, N.Y. Editor
  Language Wos A1995RR95600025 Publication Date 2002-07-26
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0022-3697; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.853 Times cited 16 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:104423 Serial 574
Permanent link to this record
 

 
Author Van Tendeloo, G.; op de Beeck, M.; De Meulenaere, P.; van Dyck, D.
  Title Towards quantitative high resolution electron microscopy? Type A1 Journal article
  Year 1995 Publication Institute of physics conference series Abbreviated Journal
  Volume 147 Issue Pages 67-72
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
  Abstract (down) The basics of the interpretation of high resolution images showing detail of the order of 0.1 nm are shortly explained here. The use of a field emission source, a CCD camera and an adapted reconstruction method for restoring the projected crystal potential (focus variation method) allows a quantitative interpretation of HREM images. Examples of partially disordered alloys and carbonate ordering in high Tc superconductors are presented.
  Address
  Corporate Author Thesis
  Publisher Place of Publication London Editor
  Language Wos A1995BE67F00014 Publication Date 0000-00-00
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0-7503-0357-3; 0951-3248; 0305-2346 ISBN Additional Links UA library record; WoS full record;
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:13015 Serial 3688
Permanent link to this record
 

 
Author Ardashnikova, E.I.; Lubarsky, S.V.; Denisenko, D.I.; Shpanchenko, R.V.; Antipov, E.V.; Van Tendeloo, G.
  Title A new way of synthesis and characterization of superconducting oxyfluoride Sr2Cu(O,F)4+\delta Type A1 Journal article
  Year 1995 Publication Physica: C : superconductivity Abbreviated Journal Physica C
  Volume 253 Issue 3/4 Pages 259-265
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) Superconducting Cu mixed oxyfluoride, Sr,Cu(O, F)(4+delta), was Obtained via fluorination of Sr2CuO3 by XeF2 in the 100-250 degrees C temperature range in a closed Ni container. The prepared samples exhibited a lower T-c in comparison with earlier reported values. Different samples in the Sr-Cu-O-F system were prepared by a solid-state reaction at 220-400 degrees C, but no formation of the oxyfluoride was detected even with an addition of xenon difluoride. These data allow one to draw conclusions on the metastability of the oxyfluoride under the conditions used, Electron microscopy and X-ray powder diffraction studies revealed large amounts of badly crystallized SrF2; this could be a reason for the small superconducting volume fraction as well as for the inhomogeneous distribution of the anions.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Amsterdam Editor
  Language Wos A1995TE08400007 Publication Date 0000-00-00
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0921-4534 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 0.942 Times cited 29 Open Access
  Notes Approved PHYSICS, APPLIED 28/145 Q1 #
  Call Number UA @ lucian @ c:irua:13322 Serial 2337
Permanent link to this record
 

 
Author Michel, K.H.; Lamoen, D.; David, W.I.F.
  Title Orientational order and disorder in solid C60 : theory and diffraction experiments Type A1 Journal article
  Year 1995 Publication Acta crystallographica: section A: foundations of crystallography Abbreviated Journal Acta Crystallogr A
  Volume 51 Issue 3 Pages 365-374
  Keywords A1 Journal article; Condensed Matter Theory (CMT)
  Abstract (down) Starting from a microscope model of the intermolecular potential, a unified description is presented of the Bragg scattering law in the orientationally disordered and in the ordered phase of solid C-60. The orientational structure factor is expanded in terms of symmetry-adapted surface harmonics. The expansion coefficients are calculated from theory and compared with experiment Their temperature evolution is studied in the disordered phase at the 260 K transitions and in the ordered phase. In the ordered phase, new results from high-resolution neutron powder diffraction are given. In the disordered phase, space group Fm $($) over bar$$ 3m, the reflections have A(1g) symmetry; in the ordered phase, space group Pa $$($) over bar 3, reflections of T-2g symmetry appear and in addition the A(1g) reflections are renormalized. The orientational density distribution is calculated. The effective crystal-field potential is constructed, its temperature evolution in the ordered phase is studied and related to the occurrence of an orientational glass.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Copenhagen Editor
  Language Wos A1995RB59400018 Publication Date 2002-07-27
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0108-7673; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.307 Times cited 14 Open Access
  Notes Approved CHEMISTRY, MULTIDISCIPLINARY 65/163 Q2 # CRYSTALLOGRAPHY 10/26 Q2 #
  Call Number UA @ lucian @ c:irua:12189 Serial 2518
Permanent link to this record
 

 
Author Vanhellemont, J.; Romano Rodriguez, A.; Fedina, L.; van Landuyt, J.; Aseev, A.
  Title Point defect reactions in silicon studied in situ by high flux electron irradiation in high voltage transmission electron microscope Type A1 Journal article
  Year 1995 Publication Materials science and technology Abbreviated Journal Mater Sci Tech-Lond
  Volume 11 Issue 11 Pages 1194-1202
  Keywords A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT)
  Abstract (down) Results are presented of in situ studies of 1 MeV electron irradiation induced (113) defect generation in silicon containing different types and concentrations of extrinsic point defects. A semiquantitative model is developed describing the influence of interfaces and stress fields and of extrinsic point defects on the (113) defect generation in silicon during irradiation. The theoretical results obtained are correlated with experimental data obtained on silicon uniformly doped with boron and phosphorus and with observations obtained by irradiating cross-sectional samples of wafers with highly doped surface layers. It is shown that in situ irradiation in a high voltage election microscope is a powerful tool for studying local point defect reactions in silicon. (C) 1995 The Institute of Materials.
  Address
  Corporate Author Thesis
  Publisher Inst Materials Place of Publication London Editor
  Language Wos A1995TQ95100016 Publication Date 2014-01-09
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0267-0836;1743-2847; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 0.995 Times cited 7 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:95911 Serial 2654
Permanent link to this record
 

 
Author Verbist, K.; Vasiliev, A.L.; Van Tendeloo, G.
  Title Y2O3 inclusions in YBa2Cu3O7-\delta thin films Type A1 Journal article
  Year 1995 Publication Applied physics letters Abbreviated Journal Appl Phys Lett
  Volume 66 Issue 11 Pages 1424-1426
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) Nanoprecipitates in YBa2Cu3O7‐δ(YBCO) thin films have been identified by high resolution electron microscopy (HREM) as Y2O3 inclusions; they correspond to two different types of epitaxial relationships namely [001] or [110] parallel to the YBCOc‐axis. The [001] precipitates are situated near the YBCO surface, in the bulk and on the YBCO film/substrate interface. The [110] precipitates have only been observed at the surface. Literature data have been reinterpreted.
  Address
  Corporate Author Thesis
  Publisher American Institute of Physics Place of Publication New York, N.Y. Editor
  Language Wos A1995QL57700042 Publication Date 2002-07-26
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0003-6951; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 3.302 Times cited 28 Open Access
  Notes Approved CHEMISTRY, PHYSICAL 54/144 Q2 # PHYSICS, ATOMIC, MOLECULAR & CHEMICAL 9/35 Q2 #
  Call Number UA @ lucian @ c:irua:13324 Serial 3564
Permanent link to this record
 

 
Author van der Burgt, M.; Karavolas, V.C.; Peeters, F.M.; Singleton, J.; Nicholas, R.J.; Herlach, F.; Harris, J.J.; Van Hove, M.; Borghs, G.
  Title Magnetotransport in a pseudomorphic GaAs/Ga0.8In0.2As/Ga0.75Al0.25As heterostructure with a Si \delta-doping layer Type A1 Journal article
  Year 1995 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
  Volume 52 Issue 16 Pages 12218-12231
  Keywords A1 Journal article; Condensed Matter Theory (CMT)
  Abstract (down) Magnetotransport properties of a pseudomorphic GsAs/Ga0.8In0.2As/Ga0.75Al0.25As heterostructure are investigated in pulsed magnetic fields up to 50 T and at temperatures of T = 1.4 and 4.2 K. The structure studied consists of a Si delta layer parallel to a Ga0.8In0.2As quantum well (QW). The dark electron density of the structure is n(c) = 1.67 x 10(16) m(-2). By illumination the density can be increased up to a factor of 4; this way the second subband in the Ga0.08In0.2As QW can become populated as well as the Si delta layer. The presence of electrons in the delta layer results in drastic changes in the transport data, especially at magnetic fields beyond 30 T. The phenomena observed are interpreted as (i) magnetic freeze-out of carriers in the delta layer when a low density of electrons is present in the delta layer, and (ii) quantization of the electron motion in the two-dimensional electron gases in both the Ga0.8In0.2As QW and the Si delta layer in the case of high densities. These conclusions are corroborated by the numerical results of our theoretical model. We obtain satisfactory agreement between model and experiment.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos A1995TB96600102 Publication Date 2002-07-27
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0163-1829;1095-3795; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 3.736 Times cited 43 Open Access
  Notes Approved PHYSICS, APPLIED 28/145 Q1 #
  Call Number UA @ lucian @ c:irua:99708 Serial 1933
Permanent link to this record
 

 
Author Lenaerts, S.; Roggen, J.; Maes, G.
  Title FT-IR characterization of tin dioxide gas sensor materials under working conditions Type A1 Journal article
  Year 1995 Publication Spectrochimica acta: part A: molecular and biomolecular spectroscopy Abbreviated Journal
  Volume 51 Issue 5 Pages 883-894
  Keywords A1 Journal article
  Abstract (down) In this work self-supporting tin dioxide disks are characterized using FT-IR spectroscopy in the presence of a reducing gas in air, and in different O2/N2 mixtures at temperatures varying from room temperature up to 450°C. Every factor inducing a change in the oxygen content of the gas atmosphere above the tin dioxide, as for instance a temperature change, a surface reaction or adsorption of another species, induces a broad, intense IR absorption band with discrete weak bands superimposed on it. This broad absorption is assigned to the electronic transition from a native donor level, the oxygen vacancy in the bulk of the domain, to the conduction band of the tin dioxide material. For the interpretation of the narrow, superimposed absorptions, two hypotheses remain. The results demonstrate that FT-IR spectroscopy is an extremely suitable technique for the characterization of semiconducting metal oxide sensors, since it allows to follow in situ the processes in the bulk, at the surface and in the surrounding gas atmosphere of the sensor material at working temperature as well as in the presence of reducing gases in air.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos A1995RJ99900014 Publication Date 2003-04-05
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 1386-1425 ISBN Additional Links UA library record; WoS full record; WoS citing articles; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:82015 Serial 5954
Permanent link to this record
 

 
Author Schryvers, D.; Ma, Y.
  Title In-situ TEM study of the Ni5Al3 to B2 + L12 decomposition in Ni65Al35 Type A1 Journal article
  Year 1995 Publication Materials letters Abbreviated Journal Mater Lett
  Volume 23 Issue Pages 105-111
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) Homogenised and quenched Ni65Al35 samples were heated and studied in situ in a CM20 electron microscope up to 900 degrees C. The Ni5Al3 phase first forming around 550 degrees C in the quenched L1(0) microtwinned martensite starts to decompose around 800 degrees C yielding B2 precipitates in a twinned L1(2) matrix. The latter twinning is a remainder of the microtwinning in the original room temperature martensite. Also the crystallographic relations between precipitates and matrix can be traced back to the original formation of twinned martensite plates within the austenite. Some aspects of the dynamics of the process are discussed on the basis of snap shots and video recordings.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Amsterdam Editor
  Language Wos A1995QW53500020 Publication Date 2002-07-25
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0167-577X; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.489 Times cited 5 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:13166 Serial 1585
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Author De Meulenaere, P.; van Dyck, D.; Van Tendeloo, G.; van Landuyt, J.
  Title Dynamical electron diffraction in substitutionally disordered column structures Type A1 Journal article
  Year 1995 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy
  Volume 60 Issue 1 Pages 171-185
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
  Abstract (down) For column structures, such as fee-based alloys viewed along the cube direction, the concept of electron channelling through the atom columns is more and more used to interpret the corresponding HREM images. In the case of(partially) disordered columns, the projected potential approach which is used in the channelling description must be questioned since the arrangement of the atoms along the beam direction might affect the exit wave of the electrons. In this paper, we critically inspect this top-bottom effect using multi-slice calculations. A modified channelling theory is introduced which turns out to be very appropriate for the interpretation of these results. For substitutionally disordered column structures, it is also discussed how to link the chemical composition of the material to statistical data of the HREM image. This results in a convenient tool to discern images taken at different thicknesses and focus values.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Amsterdam Editor
  Language Wos A1995TG59500017 Publication Date 2002-07-25
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0304-3991; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.436 Times cited 14 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:13013 Serial 770
Permanent link to this record
 

 
Author Hervieu, M.; Van Tendeloo, G.; Michel, C.; Martin, C.; Maignan, A.; Raveau, B.
  Title Synthesis and characterization of mercury based “1222” cuprates (Hg1-xMx)(Sr,Ba)2Pr2Cu2O9-\delta (M = Pr, Pb, Bi, Tl) Type A1 Journal article
  Year 1995 Publication Journal of solid state chemistry Abbreviated Journal J Solid State Chem
  Volume 115 Issue Pages 525-531
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) Five new layered cuprates, with a 1222-type structure, have been synthesized according to the formula (Hg(1-x)M(x))(Sr,Ba)(2) Pr2Cu2O9-delta with M = Pr, Pb, Pi, and Tl. They crystallize in a tetragonal cell with a approximate to a(p) and c approximate to 29.5 Angstrom; their structure consists in a triple intergrowth of oxygen-deficient perovskite, rock-salt-and fluorite-type layers. They are characterized by a mixed [Hg(1-x)M(x)O(1-delta)] layer in the rock-sail-type slice. The ED and HREM studies show that Tl, Bi, and Pb are statistically distributed in the mixed [Hg(1-x)M(x)O(1-delta)] layer, contrary to Pr which involves an ordering phenomenon along a. Different stacking defects are observed and discussed as well as the cleavage mode of the crystals. (C) 1995 Academic Press, Inc.
  Address
  Corporate Author Thesis
  Publisher Place of Publication London Editor
  Language Wos A1995QN27700033 Publication Date 2002-10-07
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0022-4596; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.133 Times cited 5 Open Access
  Notes Approved MATERIALS SCIENCE, MULTIDISCIPLINARY 135/271 Q2 # PHYSICS, APPLIED 70/145 Q2 # PHYSICS, CONDENSED MATTER 40/67 Q3 #
  Call Number UA @ lucian @ c:irua:13311 Serial 3412
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Author Van Bockstal, L.; Mahy, M.; de Keyser, A.; Hoeks, W.; Herlach, F.; Peeters, F.M.; Van de Graaf, W.; Borghs, G.
  Title Cyclotron-resonance of 2d electrons at Si-\delta-doped InSb layers grown on GaAs Type A1 Journal article
  Year 1995 Publication Physica: B : condensed matter Abbreviated Journal Physica B
  Volume 211 Issue 1-4 Pages 466-469
  Keywords A1 Journal article; Condensed Matter Theory (CMT)
  Abstract (down) Cyclotron resonance (CR) of the electrons accumulated at sheets with heavy Si doping in InSb were observed using far infrared radiation. The angular dependence of the CR follows closely the 1/cos theta behaviour with some small deviations at high angles attributed to coupling between subbands. From the effective mass of the lowest subband, which is found to be 0.027m(o), the bottom of the lowest subband was determined to lie 125 meV below the Fermi level.
  Address
  Corporate Author Thesis
  Publisher Elsevier Place of Publication Amsterdam Editor
  Language Wos A1995RD54400121 Publication Date 2003-05-01
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0921-4526; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.319 Times cited 2 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:95914 Serial 601
Permanent link to this record
 

 
Author Krekels, T.; Kaesche, S.; Van Tendeloo, G.
  Title 2√2 ap x 2√ ap phase in superconducting ceramics Type A1 Journal article
  Year 1995 Publication Physica: C : superconductivity Abbreviated Journal Physica C
  Volume 248 Issue 3/4 Pages 317-327
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) By means of electron diffraction the 2 root 2 a(p) x 2 root 2 a(p) phase, well-known in YBa2Cu3O7-delta was observed in two other perovskite-based materials (Y0.75Ce0.25)(2)(Sr0.85Y0.15)(2)AlCU2O9 and Bi1.8Pb0.4Sr2Ca2Cu3O10+x. Highly correlated ordering is observed in the ab-plane, the correlation along the c-direction being weak. The plane group of the superstructure symmetry elements was determined on the basis of observed reflection conditions in diffraction patterns. Our results unambiguously rule out oxygen ordering as a possible origin of the superstructure. Experimental evidence points out that the superstructure is associated with the CuO2 layers, that are the only structural elements common to the three compounds studied. A model is proposed where the CuO2 sheet is displacively modulated. Experimental evidence suggests a correlation between adjacent CuO2 sheets. Comparison of simulated and experimental [001] zone diffraction patterns strongly supports our model.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Amsterdam Editor
  Language Wos A1995RJ45000012 Publication Date 2003-04-07
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0921-4534; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 0.942 Times cited 13 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:13317 c:irua:13317 Serial 8
Permanent link to this record
 

 
Author Huve, M.; Martin, C.; Maignan, A.; Michel, C.; Van Tendeloo, G.; Hervieu, M.; Raveau, B.
  Title A new cuprate with mercury bilayers : the “2222” oxide Hg2-xMxBa2Pr2Cu2O10-\delta (M= Cu,Pr) Type A1 Journal article
  Year 1995 Publication Journal of solid state chemistry Abbreviated Journal J Solid State Chem
  Volume 114 Issue 1 Pages 230-235
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract (down) A ''2222'' cuprate with mercury bilayers (Hg1.5Cu0.2Pr0.3)Ba2Pr2Cu2O10-delta, has been synthesized for the first time. It crystallizes in the P4/nmm space group with a = 3.9072(1) Angstrom and c = 17.219(1) Angstrom. The powder XRD and HREM studies of this new cuprate show that its structure consists of an intergrowth of double pyramidal (oxygen-deficient perovskite) copper layers, with double fluorite-type layers and distorted triple rock salt layers (mercury bilayers). The structure of this phase can be deduced from that of the ''2212'' mercury cuprate (Hg1.5Cu0.2Pr0.3)Ba2PrCu2O8-delta by the introduction of one additional [PrO2]infinity fluorite layer. The regular stacking of the metallic layer and the uniform cationic distribution in the mercury bilayers are remarkable features of this cuprate. The stabilization of the mercury bilayers by praseodymium and the absence of superconductivity are discussed. (C) 1995 Academic Press, Inc.
  Address
  Corporate Author Thesis
  Publisher Place of Publication London Editor
  Language Wos A1995QA17000033 Publication Date 2002-10-07
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0022-4596; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.133 Times cited 6 Open Access
  Notes Approved PHYSICS, APPLIED 28/145 Q1 #
  Call Number UA @ lucian @ c:irua:104448 Serial 2310
Permanent link to this record
 

 
Author Devreese, J.T.; Verbist, G.; Peeters, F.M.
  Title Large bipolarons and high-Tc materials Type H3 Book chapter
  Year 1995 Publication Abbreviated Journal
  Volume Issue Pages 385-391
  Keywords H3 Book chapter; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems
  Abstract (down)
  Address
  Corporate Author Thesis
  Publisher Cambridge University Press Place of Publication Cambridge Editor
  Language Wos Publication Date 0000-00-00
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN ISBN Additional Links UA library record
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:11700 Serial 1778
Permanent link to this record
 

 
Author Martin, J.M.L.; François, J.P.; Gijbels, R.
  Title Accurate ab initio quartic force fields for the sulfur compounds H2S, CS2, OCS and CS Type A1 Journal article
  Year 1995 Publication Journal of molecular spectroscopy Abbreviated Journal J Mol Spectrosc
  Volume 169 Issue Pages 445-457
  Keywords A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
  Abstract (down)
  Address
  Corporate Author Thesis
  Publisher Place of Publication New York, N.Y. Editor
  Language Wos A1995QD98400014 Publication Date 2002-09-18
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0022-2852; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.482 Times cited 37 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:12277 Serial 45
Permanent link to this record
 

 
Author Smondyrev, M.A.; Devreese, J.T.; Peeters, F.M.
  Title Asymptotic expansions in the path integral approach to the bipolaron problem Type A1 Journal article
  Year 1995 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
  Volume 51 Issue Pages 15008-15016
  Keywords A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems
  Abstract (down)
  Address
  Corporate Author Thesis
  Publisher Place of Publication Lancaster, Pa Editor
  Language Wos A1995RC32900022 Publication Date 2002-07-27
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0163-1829;1095-3795; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 3.736 Times cited 32 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:11693 Serial 161
Permanent link to this record
 

 
Author Gijbels, R.; Oksenoid, K.G.
  Title Atomic mass spectrometry Type H3 Book chapter
  Year 1995 Publication Abbreviated Journal
  Volume Issue Pages 2839-2844
  Keywords H3 Book chapter; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
  Abstract (down)
  Address
  Corporate Author Thesis
  Publisher Academic Press Place of Publication London Editor
  Language Wos Publication Date 0000-00-00
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN ISBN Additional Links UA library record
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:12274 Serial 173
Permanent link to this record
 

 
Author Van Tendeloo, G.; Krekels, T.; Amelinckx, S.; Hervieu, M.; Raveau, B.; Greaves, C.
  Title Atomic resolution of interfaces in ceramic-superconductors Type P3 Proceeding
  Year 1995 Publication Abbreviated Journal
  Volume Issue Pages 35-38
  Keywords P3 Proceeding; Electron microscopy for materials research (EMAT)
  Abstract (down)
  Address
  Corporate Author Thesis
  Publisher Peking University Press Place of Publication Beijing Editor
  Language Wos Publication Date 0000-00-00
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN ISBN Additional Links UA library record
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:13318 Serial 180
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