Study of Magnetization Reversal by Minor Loops in IrMn/CoFe Exchange-Biased Bilayers
Authors: Wang, L.; Wang, S. G.; Qin, Q. H.; Han, X. F.
Source: Journal of Nanoscience and Nanotechnology, Volume 12, Number 2, February 2012 , pp. 1044-1048(5)
Publisher: American Scientific Publishers
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.
Document Type: Research Article
Publication date: February 1, 2012
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