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\bibitem{Ray_etal2012} {\textquotedblleft}\textit{Defect controlled room temperature ferromagnetism in Co-doped barium titanate nanocrystals}{\textquotedblright}. Ray S, Kolen{\textquoteright}ko YV, Kovnir KA, Lebedev OI, Turner S, Chakraborty T, Erni R, Watanabe T, Van Tendeloo G, Yoshimura M, Itoh M, Nanotechnology \textbf{23}, 025702 (2012).   http://doi.org/10.1088/0957-4484/23/2/025702

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