Exchange-bias training effect in TbFe/GdFe: Micromagnetic mechanism

被引：20
作者：
Hauet, T. [1 ]
Mangin, S. [1 ]
McCord, J. [2 ]
Montaigne, F. [1 ]
Fullerton, Eric E. [3 ]
机构：
[1] Univ Nancy, CNRS, Phys Mat Lab, F-54506 Vandoeuvre Les Nancy, France
[2] Leibniz Inst Solid State & Mat Res IFW Dresden, Inst Met Mat, D-01171 Dresden, Germany
[3] Univ Calif San Diego, Ctr Magnet Recording Res, La Jolla, CA 92093 USA
来源：
PHYSICAL REVIEW B | 2007年 / 76卷 / 14期
关键词：
D O I：
10.1103/PhysRevB.76.144423
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present magnetization and Kerr microscopy measurements of the exchange-bias training effect in hard/soft, Tb12Fe88/Gd40Fe60, bilayers. These experimental results, compared with micromagnetic simulations, unambiguously show the role of the soft GdFe layer reversal on irreversible magnetic changes in the hard TbFe layer. After a partial reversal of the GdFe magnetization layer, the next field cycle exhibits a double hysteresis loop which is due to the existence of two types of domains in the sample, and only one of these domains has been subject to the training effect. The antiferromagnetically interfacial coupling and positive exchange-bias shift permit us to exclude any direct contribution from the magnetic field to this mechanism.
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页数：5
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