Title: Evidence for coexistence of exchange bias and exchange spring effects in oxidized Co nanocluster assembled films
Authors: Dobrynin, A.N. ×
Van Bael, Margriet
Temst, Kristiaan
Lievens, Peter #
Issue Date: Aug-2007
Publisher: Institute of Physics Pub.
Series Title: New Journal of Physics vol:9 pages:1-9
Article number: 258
Abstract: We present the observation of a double hysteresis loop behavior in oxidized Co nanocluster assembled films. These films consist of ferromagnetic Co clusters of about 2 nm diameter, embedded in a thin antiferromagnetic CoO matrix. Magnetization measurements after zero field cooling from 300 to 5K show this double loop behavior, with remanent magnetization of the sample determining the point of loop separation. Such magnetization behavior is related to the presence of two ferromagnetic parts with antiparallel orientations of their magnetization vectors. While the loop shifts are provided via the exchange bias mechanism, the alignment of randomly oriented magnetization vectors of Co clusters in either of two directions suggests the presence of an exchange spring effect in the system.
ISSN: 1367-2630
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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