Magnetic and transport properties in polycrystalline La2/3Ca1/3MnO3

被引：0
作者：
Yuan, SL [1 ]
Zhao, ZY
Xia, ZC
Liu, L
Zhang, GH
Tang, J
Zhang, LJ
Feng, W
Chen, W
Zhao, LF
Liu, S
机构：
[1] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China
[2] Wuhan Univ Technol, Dept Phys, Wuhan 430070, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2003年 / 125卷 / 11-12期
基金：
中国国家自然科学基金;
关键词：
polycrystaline manganites; spin-polarized tunneling; insulator-metal transition;
D O I：
10.1016/S0038-1098(03)00032-2
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A systematic investigation of magnetic and transport properties is carried out for La2/3Ca1/3MnO3 polycrystalline sample with the average grain size similar to 300 nm. Experimental results are discussed in terms of spin-polarized tunnelling model. It is shown that although the resistivity rho(T, H) is related to the magnetization M(T, H), the variation in M(T, H) does not exactly track rho(T, H). A possible interpretation is presented by considering the alignment of Mn spins within grains and the magnetic coupling of neighboring grains. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：653 / 657
页数：5
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