Low-field magnetoresistance in nanosized La0.7Sr0.3MnO3/Pr0.5Sr0.5MnO3 composites

被引：74
作者：
Liu, JM [1 ]
Yuan, GL
Sang, H
Wu, ZC
Chen, XY
Liu, ZG
Du, YW
Huang, Q
Ong, CK
机构：
[1] Nanjing Univ, Solid State Microstruct Lab, Nanjing 210093, Peoples R China
[2] Huazhong Univ Sci & Technol, Lab Laser Technol, Wuhan 430074, Peoples R China
[3] Natl Univ Singapore, Dept Phys, Singapore 119260, Singapore
来源：
APPLIED PHYSICS LETTERS | 2001年 / 78卷 / 08期
关键词：
D O I：
10.1063/1.1350602
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Nanosized La0.7Sr0.3MnO3/Pr0.5Sr0.5MnO3 (LSMO1-xPSMOx) ceramic composites are prepared using solid-sate sintering. Their microstructural, electro- and magnetotransport properties are characterized by means of various techniques. It is found that the antiferromagnetic/ferromagnetic coupling between PSMO/LSMO at low temperature and the weak ferromagnetic order of PSMO at high temperature results in enhanced low-field magnetoresistance (LFMR) of the composites. With increasing temperature up to 250 K the observed LFMR decays more slowly than that for pure LSMO and this behavior may be explained by the spin coupling near boundaries between LSMO and PSMO grains. (C) 2001 American Institute of Physics.
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页码：1110 / 1112
页数：3
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