Per citar aquest document: http://ddd.uab.cat/record/116003
Highly asymmetric magnetic behavior in exchange biased systems induced by noncollinear field cooling
Jimenez, E. (Universidad Autónoma de Madrid. Departamento de Física de la Materia Condensada and Instituto “Nicolás Cabrera”)
Camarero, J. (Universidad Autónoma de Madrid. Departamento de Física de la Materia Condensada and Instituto “Nicolás Cabrera”)
Sort Viñas, Jordi (Institució Catalana de Recerca i Estudis Avançats)
Nogués i Sanmiquel, Josep (Institució Catalana de Recerca i Estudis Avançats)
Hoffmann, Axel (Argonne National Laboratory. Materials Science Division)
Miranda, R. (Universidad Autónoma de Madrid. Departamento de Física de la Materia Condensada and Instituto “Nicolás Cabrera”)
Teran, F. J. (Instituto Madrileño de Estudios Avanzados en Nanociencia)
Perna, P. (Instituto Madrileño de Estudios Avanzados en Nanociencia)
Garcia-Martin, J. M. (Instituto de Microelectrónica de Madrid)
Dieny, B. (SPINTEC (Spin Electronics Research))
Miranda, R. (Universidad Autónoma de Madrid. Departamento de Física de la Materia Condensada and Instituto “Nicolás Cabrera”)
American Physical Society

Data: 2009
Resum: 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.
Nota: This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Drets: Tots els drets reservats.
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Magnetic anisotropy ; Ferromagnetism ; Magnetization reversals ; Exchange interactions ; Coercive force ; Magnetic hysteresis ; Antiferromagnetism ; Atomic force microscopy ; Magnetic domains ; Polycrystals
Publicat a: Applied Physics Letters, Vol. 95, Issue 12 (September 2009) , p. 122508/1-122508/3, ISSN 1077-3118

DOI: 10.1063/1.3236768


4 p, 572.1 KB

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 Registre creat el 2014-02-19, darrera modificació el 2016-06-04



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