Measurement of the attempt frequency in antiferromagnets

Gonzalo Vallejo Fernandez, N. P. Aley, J. N. Chapman, K. O'Grady

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The characteristic relaxation frequency of a granular antiferromagnet f(0) in the Neel-Arrhenius expression has been calculated from a high resolution measurement of the time dependence of the median blocking temperature of a CoFe/IrMn exchange biased system. Calculations based on a granular model give f(0) = (2.1 +/- 0.4) x 10(12) s(-1), three orders of magnitude greater than values commonly found in the literature. (C) 2010 American Institute of Physics. [doi:10.1063/1.3522887]

Original languageEnglish
Article number222505
Pages (from-to)-
Number of pages3
JournalApplied Physics Letters
Issue number22
Publication statusPublished - 29 Nov 2010

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