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Positive exchange bias in FeF2-Fe bilayers
Nogués, Josep (University of California-San Diego. Physics Department)
Lederman, D. (West Virginia University. Physics Department)
Moran, T. J.. (University of California, San Diego. Department of Physics)
Schuller, Ivan K. (University of California, San Diego. Department of Physics)
American Physical Society

Fecha: 1996
Resumen: We have discovered a positive unidirectional exchange anisotropy in antiferromagnetic (FeF2) and ferromagnetic (Fe) bilayers cooled through the antiferromagnetic critical temperature TN in large magnetic fields. For low positive cooling fields, the ferromagnet's magnetization ( M−H) loop center shifts to negative fields, as is normally observed in other systems. In contrast, large cooling fields can cause the shift to be positive. This can be explained if the FeF2 surface spins couple to the external magnetic cooling field above TN and the FeF2-Fe interaction is antiferromagnetic.
Derechos: Tots els drets reservats.
Lengua: Anglès
Documento: Article ; Versió publicada
Publicado en: Physical review letters, Vol. 76, Issue 24 (June 1996) , p. 4624-4627, ISSN 1079-7114

DOI: 10.1103/PhysRevLett.76.4624


4 p, 128.4 KB

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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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