Phys. Rev. B 85, 012404 (2012) [4 pages]Training effect of the exchange bias in Co/CoO bilayers originates from the irreversible thermoremanent magnetization of the magnetically diluted antiferromagnetReceived 30 December 2011; published 13 January 2012 The irreversible thermoremanent magnetization (mTRMirr) of a sole, magnetically diluted epitaxial antiferromagnetic Co1−yO(100) layer is determined by the mean of its thermoremanent magnetizations (mTRM) at positive and negative remanence. During hysteresis-loop field cycling, mTRMirr exhibits successive reductions, consistent with the training effect (TE) of the exchange bias measured for the corresponding Co1−yO(100)/Co(112̅ 0) bilayer. The TE of exchange bias is shown to have its microscopic origin in the TE of mTRMirr of the magnetically diluted antiferromagnet. ©2012 American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.85.012404
DOI:
10.1103/PhysRevB.85.012404
PACS:
75.70.-i, 75.30.Et, 75.50.Ee, 75.60.Nt
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