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Author Tsirlin, A.A.; Abakumov, A.M.; Ritter, C.; Rosner, H.
Title (CuCl)LaTa2O\text{7} and quantum phase transition in the (CuX)LaM2O7 family (X=Cl, Br; M=Nb, Ta) Type A1 Journal article
Year 2012 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
Volume 86 Issue 6 Pages 064440-12
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract We apply neutron diffraction, high-resolution synchrotron x-ray diffraction, magnetization measurements, electronic structure calculations, and quantum Monte-Carlo simulations to unravel the structure and magnetism of (CuCl)LaTa2O7. Despite the pseudo-tetragonal crystallographic unit cell, this compound features an orthorhombic superstructure, similar to the Nb-containing (CuX)LaNb2O7 with X = Cl and Br. The spin lattice entails dimers formed by the antiferromagnetic fourth-neighbor coupling J(4), as well as a large number of nonequivalent interdimer couplings quantified by an effective exchange parameter J(eff). In (CuCl)LaTa2O7, the interdimer couplings are sufficiently strong to induce the long-range magnetic order with the Neel temperature T-N similar or equal to 7 K and the ordered magnetic moment of 0.53 mu(B), as measured with neutron diffraction. This magnetic behavior can be accounted for by J(eff)/J(4) similar or equal to 1.6 and J(4) similar or equal to 16 K. We further propose a general magnetic phase diagram for the (CuCl)LaNb2O7-type compounds, and explain the transition from the gapped spin-singlet (dimer) ground state in (CuCl)LaNb2O7 to the long-range antiferromagnetic order in (CuCl)LaTa2O7 and (CuBr)LaNb2O7 by an increase in the magnitude of the interdimer couplings J(eff)/J(4), with the (CuCl)LaM2O7 (M = Nb, Ta) compounds lying on different sides of the quantum critical point that separates the singlet and long-range-ordered magnetic ground states.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000308127600006 Publication Date 2012-08-29
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1098-0121;1550-235X; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 3.836 Times cited 6 Open Access
Notes Approved Most recent IF: 3.836; 2012 IF: 3.767
Call Number UA @ lucian @ c:irua:101886 Serial 3526
Permanent link to this record
 
 
Author Werner, R.; Raisch, C.; Leca, V.; Ion, V.; Bals, S.; Van Tendeloo, G.; Chasse, T.; Kleiner, R.; Koelle, D.
Title Transport, magnetic, and structural properties of La0.7Ce0.3MnO3 thin films: evidence for hole-doping Type A1 Journal article
Year 2009 Publication Physical review : B : solid state Abbreviated Journal Phys Rev B
Volume 79 Issue 5 Pages 054416,1-054416,8
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract Cerium-doped manganite thin films were grown epitaxially by pulsed laser deposition at 720 °C and oxygen pressure pO2=125 Pa and were subjected to different annealing steps. According to x-ray diffraction (XRD) data, the formation of CeO2 as a secondary phase could be avoided for pO28 Pa. However, transmission electron microscopy shows the presence of CeO2 nanoclusters even in those films which appear to be single phase in XRD. With O2 annealing, the metal-to-insulator transition temperature increases, while the saturation magnetization decreases and stays well below the theoretical value for electron-doped La0.7Ce0.3MnO3 with mixed Mn3+/Mn2+ valences. The same trend is observed with decreasing film thickness from 100 to 20 nm, indicating a higher oxygen content for thinner films. Hall measurements on a film which shows a metal-to-insulator transition clearly reveal holes as dominating charge carriers. Combining data from x-ray photoemission spectroscopy, for determination of the oxygen content, and x-ray absorption spectroscopy (XAS), for determination of the hole concentration and cation valences, we find that with increasing oxygen content the hole concentration increases and Mn valences are shifted from 2+ to 4+. The dominating Mn valences in the films are Mn3+ and Mn4+, and only a small amount of Mn2+ ions can be observed by XAS. Mn2+ and Ce4+ XAS signals obtained in surface-sensitive total electron yield mode are strongly reduced in the bulk-sensitive fluorescence mode, which indicates hole-doping in the bulk for those films which do show a metal-to-insulator transition.
Address
Corporate Author Thesis
Publisher Place of Publication Lancaster, Pa Editor
Language Wos 000263815400057 Publication Date 2009-02-13
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1098-0121;1550-235X; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 3.836 Times cited 25 Open Access
Notes Esteem 026019; Fwo Approved Most recent IF: 3.836; 2009 IF: 3.475
Call Number UA @ lucian @ c:irua:76221 Serial 3725
Permanent link to this record
 
 
Author van den Heuvel, W.; Tikhomirov, V.K.; Kirilenko, D.; Schildermans, N.; Chibotaru, L.F.; Vanacken, J.; Gredin, P.; Mortier, M.; Van Tendeloo, G.; Moshchalkov, V.V.
Title Ultralow blocking temperature and breakdown of the giant spin model in Er3+-doped nanoparticles Type A1 Journal article
Year 2010 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
Volume 82 Issue 9 Pages 094421-094421,8
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract The magnetization of luminescent Er3+-doped PbF2 nanoparticles (formula Er0.3Pb0.7F2.3) has been studied. Despite the high concentration of the doping Er3+ ions and relatively large size (8 nm) of these nanoparticles we have found no deviation between field-cooled and zero-field-cooled magnetization curves down to T=0.35 K, which points out an ultralow blocking temperature for the reversal of magnetization. We also have found strongly deviating magnetization curves M(H/T) for different temperatures T. These results altogether show that the investigated nanoparticles are not superparamagnetic, but rather each Er3+ ion in these nanoparticles is found in a paramagnetic state down to very low temperatures, which implies the breakdown of the Néel-Brown giant spin model in the case of these nanoparticles. Calculations of magnetization within a paramagnetic model of noninteracting Er3+ ions completely support this conclusion. Due to the ultralow blocking temperature, these nanoparticles have a potential for magnetic field-induced nanoscale refrigeration with an option of their optical localization and temperature control.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000281773300005 Publication Date 2010-09-13
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1098-0121;1550-235X; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 3.836 Times cited 11 Open Access
Notes Fwo Approved Most recent IF: 3.836; 2010 IF: 3.774
Call Number UA @ lucian @ c:irua:85423 Serial 3796
Permanent link to this record
 
 
Author Juchtmans, R.; Béché, A.; Abakumov, A.; Batuk, M.; Verbeeck, J.
Title Using electron vortex beams to determine chirality of crystals in transmission electron microscopy Type A1 Journal article
Year 2015 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
Volume 91 Issue 91 Pages 094112
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract We investigate electron vortex beams elastically scattered on chiral crystals. After deriving a general expression for the scattering amplitude of a vortex electron, we study its diffraction on point scatterers arranged on a helix. We derive a relation between the handedness of the helix and the topological charge of the electron vortex on one hand and the symmetry of the higher-order Laue zones in the diffraction pattern on the other for kinematically and dynamically scattered electrons. We then extend this to atoms arranged on a helix as found in crystals which belong to chiral space groups and propose a method to determine the handedness of such crystals by looking at the symmetry of the diffraction pattern. In contrast to alternative methods, our technique does not require multiple scattering, which makes it possible to also investigate extremely thin samples in which multiple scattering is suppressed. In order to verify the model, elastic scattering simulations are performed, and an experimental demonstration on Mn2Sb2O7 is given in which we find the sample to belong to the right-handed variant of its enantiomorphic pair. This demonstrates the usefulness of electron vortex beams to reveal the chirality of crystals in a transmission electron microscope and provides the required theoretical basis for further developments in this field.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000352017000002 Publication Date 2015-03-27
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1098-0121;1550-235X; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 3.836 Times cited 54 Open Access
Notes Fwo; 312483 Esteem2; 278510 Vortex; esteem2jra1; esteem2jra2 ECASJO_; Approved Most recent IF: 3.836; 2015 IF: 3.736
Call Number c:irua:125512 c:irua:125512 Serial 3825
Permanent link to this record
 
 
Author Govaerts, K.; Saniz, R.; Partoens, B.; Lamoen, D.
Title van der Waals bonding and the quasiparticle band structure of SnO from first principles Type A1 Journal article
Year 2013 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B
Volume 87 Issue 23 Pages 235210-235217
Keywords A1 Journal article; Electron microscopy for materials research (EMAT); Condensed Matter Theory (CMT)
Abstract In this work we have investigated the structural and electronic properties of SnO, which is built up from layers kept together by van der Waals (vdW) forces. The combination of a vdW functional within density functional theory (DFT) and quasiparticle band structure calculations within the GW approximation provides accurate values for the lattice parameters, atomic positions, and the electronic band structure including the fundamental (indirect) and the optical (direct) band gap without the need of experimental or empirical input. A systematic comparison is made between different levels of self-consistency within the GW approach {following the scheme of Shishkin et al. [Phys. Rev. B 75, 235102 (2007)]} and the results are compared with DFT and hybrid functional results. Furthermore, the effect of the vdW-corrected functional as a starting point for the GW calculation of the band gap has been investigated. Finally, we studied the effect of the vdW functional on the electron charge density.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000321061000003 Publication Date 2013-07-01
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1098-0121;1550-235X; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 3.836 Times cited 50 Open Access
Notes IWT; FWO; Hercules Approved Most recent IF: 3.836; 2013 IF: 3.664
Call Number UA @ lucian @ c:irua:109596 Serial 3835
Permanent link to this record
 
 
Author Yuan, R.; Claes, N.; Verheyen, E.; Tuel, A.; Bals, S.; Breynaert, E.; Martens, J.; Kirschhock, C.E.A.
Title Synthesis of IWW-type germanosilicate zeolite using 5-azonia-spiro[4, 4]nonane as structure directing agent Type A1 Journal article
Year 2016 Publication New journal of chemistry Abbreviated Journal New J Chem
Volume 40 Issue 40 Pages 4319-4324
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract IWW-type zeolite with Si/Ge of 4.9 is obtained using 5-azonia-spiro[4,4]nonane as template in fluoride-free medium under hydrothermal conditions at 175 °C. In an otherwise identical synthesis, using the related 5-azonia-spiro[4,5]decane as structure directing agent, a mixture of IWW and NON zeolite types was formed. In absence of GeO2 from the reactant mixture, pure NON formed. The IWW zeolite was characterized by XRD, SEM, and HRTEM. IWW zeolite displayed a unique morphology and could be calcined at 600 °C without loss of crystallinity. The Si/Ge ratio of the IWW zeolite was increased by postsynthesis modification. Part of the germanium could be eliminated from the as-synthesized IWW zeolite by acid leaching using 6 M HCl solution. Also the calcined material could be degermanated. Here the presence of a silicon source in the acidic leaching solution minimized structural damage. This way the Si/Ge ratio of the IWW zeolite was increased from 4.9 up to 10.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000375586400038 Publication Date 2016-02-19
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1144-0546 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 3.269 Times cited 8 Open Access OpenAccess
Notes The authors acknowledge FWO/NWO and ESRF for providing beam time at the DUBBLE and SNBL beamlines (ESRF, Grenoble) and P. Abdala for her assistance during the use of the beamline. The authors are grateful to L. Van Tendeloo for taking SEM images. I. Cuppens and K. Houthoofd are thanked for the ICP and AAS measurements. R.Y. acknowledges Chinese Scholarship Council for a CSC doctoral fellowship. JAM and CEAK acknowledge the Flemish government for long-term structural funding (Methusalem). N.C. and S.B. acknowledge financial support from European Research Council (ERC Starting Grant #335078-COLOURATOMS).; ECAS_Sara; (ROMEO:yellow; preprint:; postprint:restricted ; pdfversion:cannot); Approved Most recent IF: 3.269
Call Number c:irua:133671 Serial 4027
Permanent link to this record
 
 
Author Verbist, K.; Van Tendeloo, G.; Ye, M.; Schroeder, J.; Mehbod, M.; Deltour, R.
Title Inclusions in magnetron sputtered YBa2Cu3-x MxO7-d thin films: a study by means of electron microscopy Type A1 Journal article
Year 1996 Publication Microscopy, microanalysis, microstructures Abbreviated Journal
Volume 7 Issue Pages 17-25
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Ivry Editor
Language Wos A1996UD94200002 Publication Date 2003-08-13
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1154-2799; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 6 Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:15463 Serial 1592
Permanent link to this record
 
 
Author Hervieu; Van Tendeloo, G.; Michel; Pelloquin; Raveau
Title Mixed layers in copper based superconducting materials Type A1 Journal article
Year 1996 Publication Microscopy, microanalysis, microstructures Abbreviated Journal
Volume 7 Issue 2 Pages 107-141
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract Recently discovered series of high Tc superconductors, characterized by the existence of two types of cations within the same layer, are presented. The first family concerns the mercury based cuprates, Hg(1-x)M(x)A(2)Ca(m-1)Cu(m)O(2m+2+delta), with A = Ba and/or Sr, which exhibit structures closely related to that of the thallium cuprates TlBa2Cam-1CumO2m+3. They differ from the thallium cuprates by a high oxygen deficiency at the level of the mercury layer. It is shown that cations such as M = Cu, Pb, Tl, Bi, Ce, Pr, Cr, V, Mo, W, Ti, Sr, Ca,... can partially substitute for mercury ions, stabilizing the structures. The cationic composition of the layer depends indeed on the nature of the M cation but also on that of the alkaline earth A. For given A and M cations, the a: value remains unchanged even when the number of copper layers varies. M and Hg cations are either statistically distributed over the same site or ordered. Different types of ordering have been detected. Another way of generating mixed layers is to shear periodically the structure, leading to the formation of the so called ''collapsed phase''. In the collapsed bismuth cuprates, bismuth and copper segments, a few octahedra long, alternate in strongly waving layers. In the collapsed oxycarbonates, carbonate groups and M cations are ordered within the intermediate layer so that they can be simply described from a partial and ordered substitution of carbon for Hg,TI, Bi and other M cations building the intermediate layer. The oxycarbonitrates (Y1-xCax)(n)Ba2nCu3n-1(C,N)O3O7n-3 can also be described as an ordered substitution of carbon for copper in the 123 matrix. The different families of superconducting materials which are generated by such mechanisms are described as well as the way the different species are distributed within the mixed layers. Their influence on the physical properties are discussed.
Address
Corporate Author Thesis
Publisher Place of Publication Ivry Editor
Language Wos A1996VA22000004 Publication Date 2003-08-13
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1154-2799; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 2 Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:95287 Serial 2088
Permanent link to this record
 
 
Author Milat, O.; Krekels, T.; Van Tendeloo, G.; Amelinckx, S.
Title Ordering principles for tetrahedral chains in Ga- and Co-substituted YBCO intergrowths Type A1 Journal article
Year 1993 Publication Journal de physique: 1: physique générale, physique statistique, matière condensée, domaines interdisciplinaires Abbreviated Journal
Volume 3 Issue 5 Pages 1219-1234
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract A model for superstructure ordering in the <<chain>> layers of Ga (Co) substituted YBCO intergrowths with general formula (REO2)NSr2MCu2O5 (M = Co, Ga; n = 1, 2, ...) is proposed. By Ga or Co substitution for Cu, the structure of the <<chain>> layer changes : instead of the CuO4 planar squares, the chains consist of MO4 tetrahedra (M = Ga, Co) running along the [110] perovskite direction. The existing model for the Ga substituted <<123>> implies that all the chains are the same. Our new model is based on the results of Electron diffraction and High-resolution electron microscopy investigations. The model reveals the occurrence of two types of chains as a consequence of <<opposite>> ordering between neighbouring tetrahedra. The comer linked tetrahedra in each chain appear as alternatingly rotated in opposite sense, and a chain itself, as being displaced with respect to the underlying structure in one of two senses ; either forth (right) or back (left) along the chain direction. The regular alternation of chains of opposite type doubles the periodicity within a layer and induces the possibility for intrinsic disorder in the chain layer stacking sequence. The planar superstructure and a staggered stacking of the tetrahedral chain layers is found irrespective of the rest of the intergrowth structure. Superstructure ordering in the case of Co substitution is more perfect than for the Ga substitution.
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos A1993LC96100012 Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4304 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 16 Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:102980 Serial 2509
Permanent link to this record
 
 
Author Hervieu, M.; Michel, C.; Martin, C.; Huvé, M.; Van Tendeloo, G.; Maignan, A.; Pelloquin, D.; Goutenoire, F.; Raveau, B.
Title Mécanismes de la non-stoechiométrie dans les nouveaux supraconducteurs à haute Tc Type A1 Journal article
Year 1994 Publication Journal de physique: 3: applied physics, materials science, fluids, plasma and instrumentation Abbreviated Journal
Volume 4 Issue Pages 2057-2067
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos A1994PT17900002 Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4320 ISBN Additional Links UA library record; WoS full record;
Impact Factor Times cited Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:10041 Serial 1973
Permanent link to this record
 
 
Author Lexcellent, C.; Vivet, A.; Bouvet, C.; Blanc, P.; Satto, C.; Schryvers, D.
Title From the lattice measurements of the austenite and the martensite cells to the macroscopic mechanical behavior of shape memory alloys Type A1 Journal article
Year 2001 Publication Journal de physique: 4 Abbreviated Journal J Phys Iv
Volume 11 Issue 5 Pages 317-324
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:48388 Serial 1288
Permanent link to this record
 
 
Author Schryvers, D.
Title Martensitic and bainitic transformations in Ni-Al alloys Type A1 Journal article
Year 1994 Publication Journal de physique: 4 Abbreviated Journal
Volume C2 Issue Pages 225-234
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339 ISBN Additional Links UA library record
Impact Factor Times cited Open Access
Notes Approved
Call Number UA @ lucian @ c:irua:10014 Serial 1946
Permanent link to this record
 
 
Author Schryvers, D.; Toth, L.; Ma, Y.; Tanner, L.E.
Title Nucleation and growth of the Ni5Al3 in NiAl austenite and martensite Type A1 Journal article
Year 1994 Publication Journal de physique: 4 Abbreviated Journal
Volume C2 Issue Pages 299-304
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339 ISBN Additional Links UA library record
Impact Factor Times cited Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:10015 Serial 2388
Permanent link to this record
 
 
Author Seo, J.W.; Schryvers, D.
Title Defect structures in CuZr martensite, studies by CTEM and HRTEM Type A1 Journal article
Year 1997 Publication Journal de physique: 4 Abbreviated Journal J Phys Iv
Volume C5 Issue Pages 149-154
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos 000072520300024 Publication Date 2007-07-11
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 1 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:21351 Serial 623
Permanent link to this record
 
 
Author Schryvers, D.; Potapov, P.
Title Electron diffraction refinement of the TiNi(Fe) R-phase structure Type A1 Journal article
Year 2003 Publication Journal de physique Abbreviated Journal J Phys Iv
Volume 112 Issue Pages 751-754
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Paris Editor
Language Wos 000186503400030 Publication Date 2008-08-19
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 7 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:48389 Serial 922
Permanent link to this record
 
 
Author Schryvers, D.
Title Electron microscopy studies of martensite microstructures Type A1 Journal article
Year 1997 Publication Journal de physique: 4 Abbreviated Journal J Phys Iv
Volume C5 Issue Pages 109-118
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos 000072520300018 Publication Date 2007-07-11
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 2 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:21348 Serial 968
Permanent link to this record
 
 
Author Schryvers, D.; Yandouzi, M.; Holland-Moritz, D.; Toth, L.
Title HRTEM study of austenite and martensite in splat-cooled and nanoscale thin film Ni-Al Type A1 Journal article
Year 1997 Publication Journal de physique: 4 Abbreviated Journal J Phys Iv
Volume C5 Issue Pages 203-208
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos 000072520300033 Publication Date 2007-07-11
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 2 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:21350 Serial 1517
Permanent link to this record
 
 
Author Teodorescu, V.S.; Mihailescu, I.N.; Dinescu, M.; Chitica, N.; Nistor, L.C.; van Landuyt, J.; Barborica, A.
Title Laser induced phase transition in iron thin films Type A1 Journal article
Year 1994 Publication Journal de physique: 3: applied physics, materials science, fluids, plasma and instrumentation Abbreviated Journal
Volume 4 Issue Pages 127-130
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos A1994NT08700028 Publication Date 2007-07-16
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 2 Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:10003 Serial 1787
Permanent link to this record
 
 
Author Schryvers, D.; Boullay, P.; Kohn, R.; Ball, J.
Title Lattice deformations at martensite-martensite interfaces in Ni-Al Type A1 Journal article
Year 2001 Publication Journal de physique: 4 Abbreviated Journal J Phys Iv
Volume 11 Issue Pages 23-30
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos 000173253800005 Publication Date 2007-09-14
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 9 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:48385 Serial 1800
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 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 (up) 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 Somsen, C.; Kästner, J.; Wassermann, E.F.; Boullay, P.; Schryvers, D.
Title Microstructure of quenched Ni-rich Ni-Ti shape memory alloys Type A1 Journal article
Year 2001 Publication Journal de physique: 4 T2 – 8th European Symposium on Martensitic Transformations (ESOMAT2000), SEP 04-08, 2000, COMO, ITALY Abbreviated Journal J Phys Iv
Volume 11 Issue Pr8 Pages 445-449
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract Microstructural investigations with transmission electron microscopy were carried out on quenched Ni-Ti alloys with 52 and 54.5 at% Ni. For the Ni52Ti48 specimen long time exposed diffraction patterns of a single grain show besides the expected reflections of the B2-phase, two sets of extra reflections in different zones. The first type of spots is explained by lattice displacement waves, which are regarded as precursors of the martensitic Ni-Ti phases, B 19' and R-phase, respectively. The second set of reflection with more diffuse intensity than the other reflections is related to Ni4Ti3 precipitates in an early state of formation. For the Ni-richer Ni54.5Ti45.5 alloy only Ni4Ti3 precipitates in an early state of formation are found but no precursors of the B 19'- and R-phase.
Address
Corporate Author Thesis
Publisher E d p sciences Place of Publication Les ulis cedexa Editor
Language Wos 000173253800075 Publication Date 2007-09-14
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 2 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:104187 Serial 2073
Permanent link to this record
 
 
Author Potapov, P.; Ochin, P.; Pons, J.; Schryvers, D.
Title Nanoscale inhomogeneities in melt-spun Ni-Al Type A1 Journal article
Year 2001 Publication Journal de physique: 4 Abbreviated Journal J Phys Iv
Volume 11 Issue Pages 439-444
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos 000173253800074 Publication Date 2007-09-14
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 1 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:48387 Serial 2264
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 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 (up) 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
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Author Somsen, C.; Wassermann, E.F.; Kästner, J.; Schryvers, D.
Title Precursor phenomena in a quenched and aged Ni52Ti48 shape memory alloy Type A1 Journal article
Year 2003 Publication Journal de physique: 4 T2 – 10th International Conference on Martensitic Transformations, JUN 10-14, 2002, ESPOO, FINLAND Abbreviated Journal J Phys Iv
Volume 112 Issue Part 2 Pages 777-780
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract We measured the electrical resistivity R(T) and specific heat C-p(T) between room temperature (RT) and 4.2 K as well as the microstructure by transmission electron microscopy (TEM) of a Ni-52 Ti-48 SMA quenched from 1000degreesC (B2-Phase range) to RT and then annealed for 1h at T=380degreesC, 550degreesC and 650degreesC. In the “as quenched” and the “650degreesC annealed” state no martensitic transformations (MT's) occur. The diffraction patterns show faint reflections originating from coherent Ni4Ti3 precipitates in an early state of formation. Additional reflections of the type 1/2 <110>, 1/2 <111> and 1/3 <110> result from various lattice displacement waves, which are precursors of the MT's to the B19' and R-phase, respectively. Indeed, high resolution TEM micrographs of the [001] zone of the “as quenched” sample reveal transverse 1/2 <110> <110> lattice displacement waves, precursors of the B19' martensite. The coherent Ni4Ti3 precipitates, homogeneously distributed on a small length scale, binder the MT's in the “as quenched” and the “650degreesC annealed” state, and thus only the precursors appear. When annealed at T=380degreesC, however, coherent Ni4Ti3 precipitates with a length of 10nm are clearly visible in TEM. These precipitates trigger the NIT from the B2 to the R-phase on cooling, as evidenced also by anomalies in R(T) and C-p(T). Annealing at T-550degreesC leads to the well known two step MT's from the B2 to the R-phase and then into the B19'-phase. These martensitic transitions are clearly seen as additional peaks in the specific heat and anomalies in the resistance, while the “as quenched” and 650degreesC annealed samples show weak features in R(T) and C-p(T).
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos 000186503400036 Publication Date 2008-08-19
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 2 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:102791 Serial 2694
Permanent link to this record
 
 
Author Schryvers, D.
Title SAED and HREM results suggest a NiTi B19' based superstructure for CuZr martensite Type A1 Journal article
Year 1995 Publication Journal de physique: colloques, suppléments Abbreviated Journal
Volume 5 Issue 8 Pages 1047-1052
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos A1995TX21300085 Publication Date 2014-07-16
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 2 Open Access
Notes Approved MATERIALS SCIENCE, MULTIDISCIPLINARY 96/271 Q2 #
Call Number UA @ lucian @ c:irua:13168 Serial 2939
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Author Schryvers, D.; Potapov, P.; Ledda, A.; Shelyakov, A.
Title Structural characterisation of melt-spun Ti-Ni-Cu-ribbons Type A1 Journal article
Year 2001 Publication Journal de physique: 4 Abbreviated Journal J Phys Iv
Volume 11 Issue Pages 363-368
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos 000173253800062 Publication Date 2007-09-14
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 1 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:48386 Serial 3214
Permanent link to this record
 
 
Author Schryvers, D.; Toth, L.; van Humbeeck, J.; Beyer, J.
Title Ni2Al versus Ni5Al3 ordering in Ni65Al35 austenite and martensite Type A1 Journal article
Year 1995 Publication Journal de physique: colloques, suppléments Abbreviated Journal
Volume 5 Issue 8 Pages 1029-1034
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos A1995TX21300082 Publication Date 2014-07-16
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 12 Open Access
Notes Approved PHYSICS, APPLIED 47/145 Q2 #
Call Number UA @ lucian @ c:irua:13167 Serial 3548
Permanent link to this record
 
 
Author Ball, J.M.; Schryvers, D.
Title The analysis of macrotwins in NiAl martensite Type A1 Journal article
Year 2003 Publication Journal de physique: 4 T2 – 10th International Conference on Martensitic Transformations, JUN 10-14, 2002, ESPOO, FINLAND Abbreviated Journal J Phys Iv
Volume 112 Issue Part 1 Pages 159-162
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract We present a theoretical study of macrotwins arising in cubic to tetragonal martensitic transformations. The results help to explain some features of such macrotwins observed in Ni65Al35.
Address
Corporate Author Thesis
Publisher Place of Publication Les Ulis Editor
Language Wos 000186503200024 Publication Date 2008-08-19
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1155-4339; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 11 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:103275 Serial 3569
Permanent link to this record
 
 
Author Laffez, P.; Lebedev, O.I.; Ruello, P.; Desfeux, R.; Banerjee, G.; Capon, F.
Title Evidence of strain induced structural change in hetero-epitaxial NdNiO3 thin films with metal-insulator transition Type A1 Journal article
Year 2004 Publication European physical journal: applied physics Abbreviated Journal Eur Phys J-Appl Phys
Volume 25 Issue 1 Pages 25-31
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract Neodymium nickelate thin films have been prepared on NdGaO3 substrates by RF magnetron sputtering and post-annealing treatment under oxygen pressure. Transport properties are found to depend strongly on film thickness. Thick films show transport properties close to bulk ceramics, while very thin films exhibit a large transition from metal to insulator which occurs over a wide temperature range with high resistivity. Structure and surface morphology of the films have been investigated by Transmission Electron Microscopy (TEM) and Atomic Force Microscopy (AFM). Thin films (approximate to17 nm) grow heteroepitaxially, while thicker films (approximate to73 nm) show a granular structure. The thinnest sample suggests a symmetry change induced by the epitaxial strain of the substrate. This paper discusses the relationship between microstructure and transport properties.
Address
Corporate Author Thesis
Publisher Place of Publication Paris Editor
Language Wos 000187286000003 Publication Date 2003-12-15
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1286-0042;1286-0050; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 0.684 Times cited 12 Open Access
Notes Approved Most recent IF: 0.684; 2004 IF: 0.745
Call Number UA @ lucian @ c:irua:103256 Serial 1096
Permanent link to this record
 
 
Author Leroux, C.; Badeche, T.; Nihoul, G.; Richard, O.; Van Tendeloo, G.
Title A homologous series Pb2n+1Nb2n-1O7n-1 studied by electron microscopy Type A1 Journal article
Year 1999 Publication European physical journal: applied physics Abbreviated Journal Eur Phys J-Appl Phys
Volume 7 Issue Pages 33-40
Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Paris Editor
Language Wos 000082211000005 Publication Date 2003-06-20
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN (up) 1286-0042;1286-0050; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 0.684 Times cited 4 Open Access
Notes Approved Most recent IF: 0.684; 1999 IF: 0.208
Call Number UA @ lucian @ c:irua:29717 Serial 1488
Permanent link to this record