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Coercivity enhancement in exchange biased systems driven by interfacial magnetic frustration
Leighton, C. (University of California, San Diego. Department of Physics)
Nogués i Sanmiquel, 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

Data: 2000
Resum: 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.
Drets: Tots els drets reservats.
Llengua: Anglès
Document: article ; publishedVersion
Publicat a: Physical review letters, Vol. 84, Issue 15 (April 2000) , p. 3466-3469, ISSN 0031-9007

DOI: 10.1103/PhysRevLett.84.3466

4 p, 70.8 KB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de nanoenginyeria de materials, nanomagnetisme i nanomecànica (Gnm3)
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