Using magnetoresistance to probe reversal asymmetry in exchange biased bilayers

C. Leighton, M. Song, J. Nogués, M. C. Cyrille, Ivan K. Schuller

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

We have measured the anisotropic magnetoresistance of Fe films exchange coupled to antiferromagnetic MnF2 layers. Exchange bias and coercivity obtained from magnetoresistance are in close agreement with superconducting quantum interference device magnetometry data. In addition the magnetoresistance reveals an asymmetry in the magnetization reversal process, despite the fact that the magnetization hysteresis loops show little shape asymmetry. These results correlate well with an earlier study of magnetization reversal asymmetry by polarized neutron reflectometry. The data imply that the magnetization reverses by coherent rotation on one side of the loop and by nucleation and propagation of domain walls on the other.

Original languageEnglish (US)
Pages (from-to)344-347
Number of pages4
JournalJournal of Applied Physics
Volume88
Issue number1
DOIs
StatePublished - Jul 2000

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