Large room temperature magnetoresistance in YSZ doped La0.67Ba0.33MnO3 composite

被引:47
|
作者
Xia, ZC [1 ]
Yuan, SL [1 ]
Feng, W [1 ]
Zhang, LJ [1 ]
Zhang, GH [1 ]
Tang, J [1 ]
Liu, L [1 ]
Liu, S [1 ]
Peng, G [1 ]
Niu, DW [1 ]
Chen, L [1 ]
Zheng, QH [1 ]
Fang, ZH [1 ]
Tang, CQ [1 ]
机构
[1] Huazhong Univ Sci & Technol, Wuhan 430074, Peoples R China
关键词
manganites; grain boundaiy; electrical transport;
D O I
10.1016/j.ssc.2003.08.024
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The temperature dependence of the resistivity for composite samples of (1 - x)La0.67Ba0.33MnO3 + x YSZ(LBMO/YSZ) with different YSZ doping level of x has been investigated in a magnetic field range of 0-7000 Oe, where the YSZ represents yttria-stabilized zirconia (8 mol% Y2O3 + 92 mol% ZrO2). With increasing YSZ doping level, the range of 0-10%, the metal insulator transition temperature (T-P) decreases. However, the resistivity, specially the low temperature resistivity, increases. Results also show that the YSZ doping level has an important effect on a low field magnetoresistance (LFMR). In the magnetic field of 7000 Oe, a room temperature magnetoresistance value of 20% was observed for the composite with a YSZ doping level of 2%, which is encouraging for potential application of CMR materials at room temperature and low field. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码:291 / 294
页数:4
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