Magnetoresistance in La1-xCaxMnO3 (0 ≤ x < 0.4)

被引：4
|
作者：
Li, G
Qian, T
Feng, SJ
Liu, F
Zhou, HD
Li, XG
机构：
[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Struct Res Lab, Anhua 230026, Peoples R China
[2] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2003年 / 128卷 / 05期
关键词：
magnetically ordered materials; electronic transport; phase transitions;
D O I：
10.1016/j.ssc.2003.08.004
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The magnetic and transport properties of La1-xCaxMnO3 (0 less than or equal to x < 0.4) have been systematically studied. The magnetoresistance (MR) maximum appears at x = 0.2-0.25 and the temperature dependence of MR for x > 0.25 shows a much broader profile than that of samples for x = 0.2-0.25. Based on a scenario in which there is a short-range charge ordering (CO) state coexisting in the ferromagnetic state matrix for x > 0.25, and the least or even no short-range CO state exists in samples for x = 0.2-0.25, the above observations can be understood. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：171 / 176
页数：6
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