Magnetic phase boundary and transport properties of La0.67Ca0.33MnO3

被引：2
作者：
Xia, ZC [1 ]
Hu, MT [1 ]
Zeng, FR [1 ]
Liu, G [1 ]
Dong, B [1 ]
Xiao, LX [1 ]
Liu, L [1 ]
Liu, S [1 ]
Tang, CQ [1 ]
Yuan, SL [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan 430074, Peoples R China
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2005年 / 242卷 / 08期
关键词：
D O I：
10.1002/pssb.200540038
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The effects of Fe3O4 magnetic phase and its doping level on the electric transport and magnetic properties of La0.67Ca0.33MnO3 were investigated, where the Fe3O4 doping level was 0, 0.1, 0.5, 1, 7.5, and 20%. A twofold effect, enhancement and suppression, on magnetization properties was observed in the La0.67Ca0.33MnO3/Fe3O4 composites. For a low field ranging from 0 to 0.3 T an obvious enhanced magnetization was observed, while for a higher field a suppressed magnetization was observed. A new insulatormetal transition behaviour was observed for all the composites. Compared with pure La0.67Ca0.33MnO3, the twofold influence and new transition were discussed by considering the separation and pinning effects of the Fe3O4 on the growth and rotation of La0.67Ca0.33 MnO3 ferromagnetic domain. (c) 2005 WILEYNCH Verlag GmbH & Co. KGaA, Weinheim.
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页码：1705 / 1711
页数：7
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