Electronic and magnetic transitions in Bi-Sr-Mn-O oxides:: high temperature charge-ordering

被引：9
|
作者：
García-Muñoz, JL
Frontera, C
Aranda, MAG
Ritter, C
Llobet, A
Ranno, L
Respaud, M
Vanacken, J
Broto, JM
机构：
[1] CSIC, Inst Ciencia Mat Barcelona, E-08193 Bellaterra, Spain
[2] Univ Malaga, E-29071 Malaga, Spain
[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
[4] CNRS, Lab Louis Neel, F-38042 Grenoble 9, France
[5] INSA, SNCMP, F-31077 Toulouse, France
[6] INSA, LPMC, F-31077 Toulouse, France
[7] Katholieke Univ Leuven, LVSM, B-3001 Heverlee, Belgium
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 242卷
关键词：
charge-ordering; doping effects; phase transitions-electronic; magnetization-high field; perovskite structure; magnetic structure;
D O I：
10.1016/S0304-8853(01)01029-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Neutron/synchrotron diffraction data and magnetic measurements provide direct evidence of charge/orbital ordering at anomalously high temperatures in (Bi,Sr)MnO3 manganites. We report oil the electronic and magnetic transitions of several oxides of this family. A mechanism based on the 6s(2) lone pair of Bi is proposed to strongly decrease the mobility of e(g) electrons and markedly favor charge-ordering. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：645 / 647
页数：3
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