Tailoring the magnetization reversal of elliptical dots using exchange bias (invited)
Sort Viñas, Jordi (Institució Catalana de Recerca i Estudis Avançats)
Buchanan, K. S. (Argonne National Laboratory. Materials Science Division)
Pearson, J. E. (Argonne National Laboratory. Materials Science Division)
Hoffmann, Axel (Argonne National Laboratory. Materials Science Division)
Menéndez Dalmau, Enric (Universitat Autònoma de Barcelona. Departament de Física)
Salazar Álvarez, Germán (Institut Català de Nanociència i Nanotecnologia)
Baró, M. D.. (Universitat Autònoma de Barcelona. Departament de Física)
Miron, M. ((SPINTEC (Spin Electronics Research)))
Rodmacq, B. ((SPINTEC (Spin Electronics Research)))
Dieny, B. ((SPINTEC (Spin Electronics Research)))
Nogués, Josep (Institut Català de Nanociència i Nanotecnologia)

Date:	2008
Abstract:	Exchange bias effects have been studied in elliptical dots composed of ferromagnetic Ni80Fe20-antiferromagnetic Ir20Mn80 bilayers. The magnetization reversal mechanisms and magnetic configurations have been investigated by magneto-optic Kerr effect and magnetic force microscopy. Although the obtained bias fields in these dots are relatively small, the magnetization reversal is found to be influenced by the ferromagnetic-antiferromagnetic coupling. Namely, for some off-axis angles of measurement, the magnetization reversal mechanism of the Ni80Fe20-Ir20Mn80 ellipses depends on whether exchange bias is induced along the minor or major axis of the ellipses. Hence, exchange bias is shown to be an effective means for tailoring the magnetization reversal of elliptical dots after sample fabrication.
Grants:	Ministerio de Economía y Competitividad MAT-2007-66302-C02 Ministerio de Economía y Competitividad HF2006-0197 Agència de Gestió d'Ajuts Universitaris i de Recerca 2005/SGR-00401
Note:	This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Ferromagnetisme ; Kerr, Efecte de ; Magnetisme ; Polarització (Electricitat)
Published in:	Journal of applied physics, Vol. 103, Núm. 7 (April 2008) , p. 7C109/1-7C109/5, ISSN 1089-7550

DOI: 10.1063/1.2840467

6 p, 514.5 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3)
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles