Giant magnetoresistance for ensembles of ferromagnetic granules in variable range hopping conductivity regime

被引：2
|
作者：
Kozub, V. I. [1 ]
Shumilin, A. V. [1 ]
机构：
[1] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
来源：
SOLID STATE COMMUNICATIONS | 2013年 / 171卷
关键词：
Granular metals; Hopping conductivity; Magnetoresistance; METAL;
D O I：
10.1016/j.ssc.2013.07.031
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We study an effect of moderate magnetic field on variable range hopping conductivity in arrays of ferromagnetic granules separated by tunnel barriers. It is shown that the resulting magnetoresistance can be significantly larger than the standard "giant" magnetoresistance in Fe-N-Fe-N ... multilayers. The effect is related to a gain in densities of states available for the virtual processes within the intermediate granules due to magnetic-field induced alignment of the granule magnetizations. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：55 / 58
页数：4
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