Study of magnetization reversal by minor loops in IrMn/CoFe exchange-biased bilayers.

作者信息

Wang L, Wang S G, Qin Q H, Han X F

机构信息

State Key Laboratory of Magnetism, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, China.

出版信息

J Nanosci Nanotechnol. 2012 Feb;12(2):1044-8. doi: 10.1166/jnn.2012.4259.

DOI:10.1166/jnn.2012.4259

PMID:22629892

Abstract

We report a detailed investigation of the magnetization reversal by minor loops in Co75Fe25 (t) single layer and Ir22Mn78(10 nm)/CoFe(t) exchange-biased bilayers with different CoFe thicknesses. With increasing CoFe layer thickness in IrMn/CoFe bilayers, the magnetization reversal process shows a transition from the coherent rotation to the domain-wall motion, which is attributed to the competition among the antiferromagnetic domain wall energy, ferromagnetic domain wall energy, and the interface coupling between antiferromagnetic and ferromagnetic layers.

摘要