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Influence of chemical prehistory on the colossal magnetoresistance of La0.7Ca0.3MnO3 ceramics

Authors
Shlyakhtin, OA; Oh, YJ; Tretyakov, YD
Issue Date
1999-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SOLID STATE COMMUNICATIONS, v.111, no.12, pp.711 - 715
Abstract
Evolution of magnetoresistance at H = 1.5 T during sintering of ceramics is studied for La0.7Ca0.3MnO3 samples obtained using solid state (SS) synthesis and freeze-drying (FD) methods. Significant enhancement of magnetoresistance peak values and lowering of peak temperature for dense SS samples can be related to larger oxygen non-stoichiometry due to complicated oxygen diffusion or influence of La-doped MnOx inclusions, generating new pinning centers. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
Keywords
GIANT MAGNETORESISTANCE; OXYGEN STOICHIOMETRY; GRAIN-BOUNDARIES; FILMS; LA0.67CA0.33MNO3; PARTICLE; SIZE; GIANT MAGNETORESISTANCE; OXYGEN STOICHIOMETRY; GRAIN-BOUNDARIES; FILMS; LA0.67CA0.33MNO3; PARTICLE; SIZE; magnetically ordered materials; chemical synthesis; scanning and transmission electron microscopy; flux pinning and creep
ISSN
0038-1098
URI
https://pubs.kist.re.kr/handle/201004/142614
DOI
10.1016/S0038-1098(99)00261-6
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