Local manipulation and reversal of the exchange bias field by ion irradiation in FeNi/FeMn double layers

被引：133

作者：

Mougin, A ^{[1
]}

Mewes, T ^{[1
]}

Jung, M ^{[1
]}

Engel, D ^{[1
]}

Ehresmann, A ^{[1
]}

Schmoranzer, H ^{[1
]}

Fassbender, J ^{[1
]}

Hillebrands, B ^{[1
]}

机构：

[1] Univ Kaiserslautern, Fachbereich Phys & Forsch & Entwicklungsschwerpun, D-67663 Kaiserslautern, Germany

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.63.060409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Both the direction and the strength of the exchange bias field H-eb of an FeNi/FeMn double layer are manipulated locally by He ion irradiation in an applied magnetic field. The magnitude of H-eb is enhanced over its initial value in the low ion dose regime. Above a threshold irradiation dose a reduction and eventually a suppression of H-eb is found. The direction of H-eb is initialized by the field direction during irradiation. These observations are discussed considering the structural modifications caused by the ion bombardment. The data are well described by a model, which is based on the competition between the enhancement of the exchange bias field strength due to defect creation in the antiferromagnetic layer and the decrease induced by intermixing at thr ferromagnet/antiferromagnet interface.

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页数：4

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