Magnetoresistance plateau in La2/3Ca1/3Bi x Mn1-x O3 granular system

被引：1
|
作者：
Zhang Guoqing [1 ]
Pan Chunxu [1 ,2 ]
Zhang Guodong [3 ]
机构：
[1] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Key Lab Acoust & Photon Mat & Devices, Minist Educ, Wuhan 430072, Peoples R China
[3] Wuhan Univ, Dept Mat Engn, Wuhan 430072, Peoples R China
来源：
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2009年 / 24卷 / 01期
关键词：
perovskite manganite; phase segregation; composite; magnetoresistance plateau; ROOM-TEMPERATURE MAGNETORESISTANCE; LOW-FIELD; GIANT MAGNETORESISTANCE; TRANSPORT-PROPERTIES; GRAIN-BOUNDARIES; FILMS; LA0.67CA0.33MNO3; POLYCRYSTALLINE; ENHANCEMENT; COMPOSITES;
D O I：
10.1007/s11595-009-1061-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of doping additional Bi on the magnetoresistance (MR) of La2/3Ca1/3B (x) Mn1-x O-3 was investigated. It is found that traditional colossal magnetoresistance (CMR) peak can only be observed in the x < 0.05 samples and the peak value decreases with the increase of x, but the xa parts per thousand yen0.05 samples show a magnetoresistance plateau above 200 K because of the presence of additional (La,Ca,Bi)-O layers. Moreover, this MR plateau is enhanced for the segregation of the La, Ca, and Bi elements.
引用
收藏
页码：61 / 64
页数：4
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