Phase diagrams of perovskite-type manganese oxides

被引：4
作者：
Tomioka, Y. [1 ]
Okimoto, Y.
Jung, J. H.
Kumai, R.
Tokura, Y.
机构：
[1] AIST, CERC, Tsukuba, Ibaraki, Japan
[2] Univ Tokyo, Dept Appl Phys, Tokyo 113, Japan
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2006年 / 67卷 / 9-10期
关键词：
magnetic materials; magnetic properties; phase transitions;
D O I：
10.1016/j.jpcs.2006.06.005
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this paper, a competition between a ferromagnetic metal and a charge/orbital-ordered insulator has been investigated for RE(1-x)AE(x)MnO(3) (x = 0.45) with RE and AE being rare earth elements, ranging from La to Gd, and alkaline earth elements, Ca, Sr and Ba, respectively. A phase diagram is deduced in the plane of the effective one-electron bandwidth versus the magnitude of quenched disorder, which can be controlled by the averaged value and the variance of the RE/AE ionic radii, respectively. In the vicinity of the phase boundary, the ferromagnetic transition temperature is critically suppressed, and the colossal magnetoresistance (CMR) is enhanced. (c) 2006 Elsevier Ltd. All rights reserved.
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收藏
页码：2214 / 2221
页数：8
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