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The role of interfaces in CoFe/IrMn exchange biased systems

Vopsaroiu, M., O'Grady, K., Vallejo Fernandez, Gonzalo (orcid.org/0000-0002-4826-1547) and Fernandez-Outon, L.E. (2006) The role of interfaces in CoFe/IrMn exchange biased systems. IEEE Transactions on Magnetics. pp. 3008-3010. ISSN 1941-0069

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A trilayer system consisting of an IrMn layer exchanged coupled to two CoFe layers of equal thickness has been studied. A single stage reversal was observed over a wide range of temperatures. Two bilayers with the same thicknesses of the pinning layer but different ferromagnetic thicknesses were also studied. By comparing the magnetic properties of these three stacks the effect of the interfacial area on the exchange field and the coercivity has been determined. We find that the interfacial area has a very minor effect on the exchange field H-ex and the blocking temperature (T-B) but causes a doubling of the coercivity (H-c). This indicates that H-c is dominated by the interface whereas the exchange bias is controlled by volumetric effects.

Item Type: Article
Copyright, Publisher and Additional Information: © 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: exchange bias,interface,thermal activation,TRILAYERS,FILMS,SIZE
Institution: The University of York
Academic Units: The University of York > Physics (York)
Depositing User: Repository Officer
Date Deposited: 15 Dec 2006
Last Modified: 12 Jul 2016 19:56
Published Version: http://dx.doi.org/10.1109/TMAG.2006.879755
Status: Published
Refereed: Yes
URI: http://eprints.whiterose.ac.uk/id/eprint/1826

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