Coercivity enhancement in exchange biased systems driven by interfacial magnetic frustration
Leighton, C. (University of California, San Diego. Department of Physics)
Nogués, Josep (Universitat Autònoma de Barcelona. Departament de Física)
Jönsson-Akerman, B. J. (University of California, San Diego. Department of Physics)
Schuller, Ivan K. (University of California, San Diego. Department of Physics)
American Physical Society

Fecha:	2000
Resumen:	We report the temperature and cooling field dependence of the coercivity of exchange biased MnF2/Fe bilayers. When the antiferromagnetic surface is in a state of maximum magnetic frustration and the net exchange bias is zero, we observe a strong enhancement of the coercivity, which is proportional to the exchange coupling between the layers. Hence, the coercivity can be tuned in a reproducible and repeatable fashion in the same sample. We propose that a frustrated interface provides local energy minima which effectively pin the propagating domain walls in the ferromagnet, leading to an enhanced coercivity.
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; Versió publicada
Publicado en:	Physical review letters, Vol. 84, Issue 15 (April 2000) , p. 3466-3469, ISSN 1079-7114

DOI: 10.1103/PhysRevLett.84.3466

4 p, 70.8 KB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Grupo de nanoingeniería de materiales, nanomagnetismo y nanomecánica (Gnm3)
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