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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

Date: 2000
Abstract: 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.
Rights: Tots els drets reservats.
Language: Anglès.
Document: article ; publishedVersion
Published in: 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

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3)
Articles > Published articles

 Record created 2014-01-22, last modified 2020-04-25



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