Magneto-optical study of magnetization reversal asymmetry in exchange bias

A. Tillmanns; S. Oertker; B. Beschoten; G. Güntherodt; C. Leighton; Ivan K. Schuller; J. Nogués

doi:10.1063/1.2392283

Magneto-optical study of magnetization reversal asymmetry in exchange bias

A. Tillmanns, S. Oertker, B. Beschoten, G. Güntherodt, C. Leighton, Ivan K. Schuller, J. Nogués

Chemical Engineering and Materials Science

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Abstract

The asymmetric magnetization reversal in exchange biased FeMn F2 involves coherent (Stoner-Wohlfarth) magnetization rotation into an intermediate, stable state perpendicular to the applied field. We provide here the experimentally tested analytical conditions for the unambiguous observation of both longitudinal and transverse magnetization components using the magneto-optical Kerr effect. This provides a fast and powerful probe of coherent magnetization reversal as well as its chirality. Surprisingly, the sign and asymmetry of the transverse magnetization component of exchange biased, low-anisotropy Mn F2 and high-anisotropy Fe F2 change with the angle between cooling and measurement fields.

Original language	English (US)
Article number	202512
Journal	Applied Physics Letters
Volume	89
Issue number	20
DOIs	https://doi.org/10.1063/1.2392283
State	Published - 2006

Bibliographical note

Funding Information:
Work supported by DFG/SPP1133, European Community’s Human Potential Program/NEXBIAS, Spanish CICYT, Catalan DGR, and US-DOE. One of the authors (I.K.S.) thanks the Humboldt Foundation for support and RWTH faculty and researchers for their hospitality during a sabbatical stay in Aachen.

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abstract = "The asymmetric magnetization reversal in exchange biased FeMn F2 involves coherent (Stoner-Wohlfarth) magnetization rotation into an intermediate, stable state perpendicular to the applied field. We provide here the experimentally tested analytical conditions for the unambiguous observation of both longitudinal and transverse magnetization components using the magneto-optical Kerr effect. This provides a fast and powerful probe of coherent magnetization reversal as well as its chirality. Surprisingly, the sign and asymmetry of the transverse magnetization component of exchange biased, low-anisotropy Mn F2 and high-anisotropy Fe F2 change with the angle between cooling and measurement fields.",

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AU - Oertker, S.

AU - Beschoten, B.

AU - Güntherodt, G.

AU - Leighton, C.

AU - Schuller, Ivan K.

AU - Nogués, J.

N1 - Funding Information: Work supported by DFG/SPP1133, European Community’s Human Potential Program/NEXBIAS, Spanish CICYT, Catalan DGR, and US-DOE. One of the authors (I.K.S.) thanks the Humboldt Foundation for support and RWTH faculty and researchers for their hospitality during a sabbatical stay in Aachen.

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N2 - The asymmetric magnetization reversal in exchange biased FeMn F2 involves coherent (Stoner-Wohlfarth) magnetization rotation into an intermediate, stable state perpendicular to the applied field. We provide here the experimentally tested analytical conditions for the unambiguous observation of both longitudinal and transverse magnetization components using the magneto-optical Kerr effect. This provides a fast and powerful probe of coherent magnetization reversal as well as its chirality. Surprisingly, the sign and asymmetry of the transverse magnetization component of exchange biased, low-anisotropy Mn F2 and high-anisotropy Fe F2 change with the angle between cooling and measurement fields.

AB - The asymmetric magnetization reversal in exchange biased FeMn F2 involves coherent (Stoner-Wohlfarth) magnetization rotation into an intermediate, stable state perpendicular to the applied field. We provide here the experimentally tested analytical conditions for the unambiguous observation of both longitudinal and transverse magnetization components using the magneto-optical Kerr effect. This provides a fast and powerful probe of coherent magnetization reversal as well as its chirality. Surprisingly, the sign and asymmetry of the transverse magnetization component of exchange biased, low-anisotropy Mn F2 and high-anisotropy Fe F2 change with the angle between cooling and measurement fields.

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Magneto-optical study of magnetization reversal asymmetry in exchange bias

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