Anomalous positive exchange bias in nanostructured FeMn/Co/FeMn networks

被引：17

作者：

Jiang, Changjun ^{[1
]}

Xue, Desheng ^{[1
]}

Fan, Xiaolong ^{[1
]}

Guo, Dangwei ^{[1
]}

Liu, Qingfang ^{[1
]}

机构：

[1] Lanzhou Univ, Key Lab Magnetism & Magnet Mat MOE, Lanzhou 730000, Peoples R China

来源：

NANOTECHNOLOGY | 2007年 / 18卷 / 33期

关键词：

D O I：

10.1088/0957-4484/18/33/335703

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

FeMn/Co/FeMn multilayers are sputtered onto porous alumina templates and silicon, respectively. The FeMn/Co/FeMn multilayer on the porous alumina templates forms an interconnected network nanostructure, while the FeMn/Co/FeMn multilayer on the silicon substrate forms a continuous film. The SQUID testing results show that the exchange bias (HE) and coercivity (H-c) of the FeMn/Co/FeMn multilayer on the porous alumina templates strongly depend on the temperature. A positive exchange bias loops shift is observed at 250 K under field-cooled conditions. However, this is not found in the FeMn/Co/FeMn multilayer on silicon for the same layer thickness. We attribute the positive exchange bias loops shift of the network nanostructured FeMn/Co/FeMn multilayer to the decreased exchange coupling due to the existence of the holes in the interconnected nanostructure.

引用

页数：4

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