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Title: Reversing the training effect in exchange biased CoO/Co bilayers
Authors: Brems, Steven ×
Buntinx, D
Temst, Kristiaan
Van Haesendonck, Christian
Radu, F
Zabel, H #
Issue Date: Oct-2005
Publisher: American physical soc
Series Title: Physical Review Letters vol:95 issue:15 pages:1-4
Article number: 157202
Abstract: We performed a detailed study of the training effect in exchange biased CoO/Co bilayers. High-resolution measurements of the anisotropic magnetoresistance (AMR) display an asymmetry in the first magnetization reversal process and training in the subsequent reversal processes. Surprisingly, the AMR measurements as well as magnetization measurements reveal that it is possible to partially reinduce the untrained state by performing a hysteresis measurement with an in-plane external field perpendicular to the cooling field. Indeed, the next hysteresis loop obtained in a field parallel to the cooling field resembles the initial asymmetric hysteresis loop, but with a reduced amount of spin rotation occurring at the first coercive field. This implies that the antiferromagnetic domains, which are created during the first reversal after cooling, can be partially erased.
ISSN: 0031-9007
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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