Highly asymmetric magnetic behavior in exchange biased systems induced by noncollinear field cooling

E. Jiḿnez; J. Camarero; J. Sort; J. Nogús; A. Hoffmann; F. J. Teran; P. Perna; J. M. García-Martín; B. Dieny; R. Miranda

doi:https://doi.org/10.1063/1.3236768

Highly asymmetric magnetic behavior in exchange biased systems induced by noncollinear field cooling

E. Jiḿnez, J. Camarero, J. Sort, J. Nogús, A. Hoffmann, F. J. Teran, P. Perna, J. M. García-Martín, B. Dieny, R. Miranda

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Abstract

A detailed study of the angular dependence of the magnetization reversal in polycrystalline ferromagnetic (FM)/antiferromagnetic Co/IrMn bilayers with noncollinear FM and unidirectional anisotropies shows a peculiar asymmetric magnetic behavior. The anisotropy configuration is set via a field cooling (FC) procedure with the magnetic field misaligned with respect to the easy magnetization direction of the FM layer. Different magnetization reversal modes are observed for either positive or negative angles with respect to the FC direction. The angular dependence of both coercivity and exchange bias also clearly displays the broken symmetry of the induced noncollinearity. Our findings are reproduced with a modified Stoner-Wohlfarth model including the induced anisotropy configuration. Our results highlight the importance of the relative angle between anisotropies in exchange bias systems, opening a new path for the tailoring of their magnetic properties. © 2009 American Institute of Physics.

Original language	English
Article number	122508
Journal	Applied physics letters
Volume	95
DOIs	https://doi.org/10.1063/1.3236768
Publication status	Published - 1 Jan 2009

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title = "Highly asymmetric magnetic behavior in exchange biased systems induced by noncollinear field cooling",

abstract = "A detailed study of the angular dependence of the magnetization reversal in polycrystalline ferromagnetic (FM)/antiferromagnetic Co/IrMn bilayers with noncollinear FM and unidirectional anisotropies shows a peculiar asymmetric magnetic behavior. The anisotropy configuration is set via a field cooling (FC) procedure with the magnetic field misaligned with respect to the easy magnetization direction of the FM layer. Different magnetization reversal modes are observed for either positive or negative angles with respect to the FC direction. The angular dependence of both coercivity and exchange bias also clearly displays the broken symmetry of the induced noncollinearity. Our findings are reproduced with a modified Stoner-Wohlfarth model including the induced anisotropy configuration. Our results highlight the importance of the relative angle between anisotropies in exchange bias systems, opening a new path for the tailoring of their magnetic properties. {\textcopyright} 2009 American Institute of Physics.",

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doi = "https://doi.org/10.1063/1.3236768",

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T1 - Highly asymmetric magnetic behavior in exchange biased systems induced by noncollinear field cooling

AU - Jiḿnez, E.

AU - Camarero, J.

AU - Sort, J.

AU - Nogús, J.

AU - Hoffmann, A.

AU - Teran, F. J.

AU - Perna, P.

AU - García-Martín, J. M.

AU - Dieny, B.

AU - Miranda, R.

PY - 2009/1/1

Y1 - 2009/1/1

N2 - A detailed study of the angular dependence of the magnetization reversal in polycrystalline ferromagnetic (FM)/antiferromagnetic Co/IrMn bilayers with noncollinear FM and unidirectional anisotropies shows a peculiar asymmetric magnetic behavior. The anisotropy configuration is set via a field cooling (FC) procedure with the magnetic field misaligned with respect to the easy magnetization direction of the FM layer. Different magnetization reversal modes are observed for either positive or negative angles with respect to the FC direction. The angular dependence of both coercivity and exchange bias also clearly displays the broken symmetry of the induced noncollinearity. Our findings are reproduced with a modified Stoner-Wohlfarth model including the induced anisotropy configuration. Our results highlight the importance of the relative angle between anisotropies in exchange bias systems, opening a new path for the tailoring of their magnetic properties. © 2009 American Institute of Physics.

AB - A detailed study of the angular dependence of the magnetization reversal in polycrystalline ferromagnetic (FM)/antiferromagnetic Co/IrMn bilayers with noncollinear FM and unidirectional anisotropies shows a peculiar asymmetric magnetic behavior. The anisotropy configuration is set via a field cooling (FC) procedure with the magnetic field misaligned with respect to the easy magnetization direction of the FM layer. Different magnetization reversal modes are observed for either positive or negative angles with respect to the FC direction. The angular dependence of both coercivity and exchange bias also clearly displays the broken symmetry of the induced noncollinearity. Our findings are reproduced with a modified Stoner-Wohlfarth model including the induced anisotropy configuration. Our results highlight the importance of the relative angle between anisotropies in exchange bias systems, opening a new path for the tailoring of their magnetic properties. © 2009 American Institute of Physics.

U2 - https://doi.org/10.1063/1.3236768

DO - https://doi.org/10.1063/1.3236768

M3 - Article

SN - 0003-6951

VL - 95

JO - Applied physics letters

JF - Applied physics letters

M1 - 122508

ER -

Highly asymmetric magnetic behavior in exchange biased systems induced by noncollinear field cooling

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