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

Jiang, Changjun and Xue, Desheng and Fan, Xiaolong and Guo, Dangwei and Liu, Qingfang (2007) Anomalous positive exchange bias in nanostructured FeMn/Co/FeMn networks. NANOTECHNOLOGY, 18 (33).

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Official URL: http://www.iop.org/EJ/abstract/-search=66089193.1/...

Abstract

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.

Item Type:Article
Uncontrolled Keywords:ANTIDOT ARRAYS; BILAYERS; TEMPERATURE; DEPENDENCE; ANISOTROPY; FILMS
Subjects:Material Science > Nanofabrication processes and tools
ID Code:6449
Deposited By:IoN
Deposited On:24 Sep 2009 10:22
Last Modified:24 Sep 2009 10:22

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