Electrical transport and magnetic properties in La0.7Sr0.3MnO3 and SrFe12O19 composite system
Electrical transport and magnetic properties in La0.7Sr0.3MnO3 and SrFe12O19 composite system
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La0.7Sr0.3MnO3 和 SrFe12O19 复合体系的电输运和磁性能
DOI：
10.1016/j.jallcom.2008.10.027
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发表时间：
2009-05
影响因子：
6.2
通讯作者：
中科院分区：
文献类型：
--
作者：
用化学共沉淀法合成了La(sub0.7)、Sr(sub0.3)、MnO(Sub3)(LSMO)和SrFe(Sub12)、O(Sub19)样品。采用固相共烧法制备了(1-x)LSMO：xSFO(x为质量分数)复合材料。系统地研究了衍生复合材料的微观结构、电学输运和磁性能。与纯LSMO相比，复合材料的低场磁阻(LFMR)增强。当x=0.05时，300K时的磁阻(MR)值约为纯LSMO的2.9倍。由于LSMO和SFO晶界附近的磁无序和反铁磁(AFM)耦合增强，导致界面和晶界上的自旋相关的晶间隧道效应增强。
La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (LSMO) and SrFe{sub 12}O{sub 19} (SFO) samples were synthesized by chemical coprecipitation method. The composites of (1 - x)LSMO:xSFO (x is mass%) were prepared using solid-state cosintering. The microstructure, electrical transport, and magnetic properties of the derived composites were systematically investigated. Compared with pure LSMO, the enhancement of low-field magnetoresistance (LFMR) is observed in the composites. The magnetoresistance (MR) value at 300 K for the sample with x = 0.05 is about 2.9 times larger than that of the pure LSMO. The enhanced MR was attributed to the enhanced spin-dependent intergrain tunneling at the interfaces and grain boundaries due to the enhanced magnetic disorders and antiferromagnetic (AFM) couplings near boundaries between LSMO and SFO grains.
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DOI：
10.1088/0022-3727/40/3/002
发表时间：
2007-02
期刊：
Journal of Physics D: Applied Physics
影响因子：
--
作者：
J. Miao;S. Yuan;G. Ren;X. Xiao;Gongqi Yu;Yongqiang Wang;S. Yin
通讯作者：
J. Miao;S. Yuan;G. Ren;X. Xiao;Gongqi Yu;Yongqiang Wang;S. Yin
影响因子：
4
作者：
Mahesh, R;Mahendiran, R;Rao, CNR
通讯作者：
Rao, CNR
影响因子：
8.6
作者：
Hwang, HY;Cheong, SW;Batlogg, B
通讯作者：
Batlogg, B
影响因子：
4
作者：
Bowen, M;Bibes, M;Fert, A
通讯作者：
Fert, A
影响因子：
3
作者：
S. Young;C. C. Lin-C.;Jen-Bin Shi;Hone-Zern Chen;L. Horng
通讯作者：
S. Young;C. C. Lin-C.;Jen-Bin Shi;Hone-Zern Chen;L. Horng