Volume 68, Number 2, October 2004
|Page(s)||233 - 239|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 October 2004|
Enhanced exchange bias due to an ultra-thin, non-magnetic insulator spacer layer
Institut für Festkörperforschung - Forschungszentrum Jülich GmbH D-52425 Jülich, Germany
Corresponding author: A.Paul@fz-juelich.de
Accepted: 27 August 2004
The exchange bias effect of bilayers is found to significantly increase when an ultra-thin, non-magnetic insulating x spacer is added at the ferromagnet/antiferromagnet interface. The dependence on the spacer thickness is non-monotonic with a maximum two-fold enhancement of the exchange bias field at a spacer thickness of 1.0. These observations are explained in terms of a discontinuous layer structure of the spacer and its thickness evolution. There is no indication of a magnetic interaction across the x spacer layer.
PACS: 68.65.Ac – Multilayers / 75.30.Gw – Magnetic anisotropy / 75.70.Cn – Magnetic properties of interfaces (multilayers, superlattices, heterostructures)
© EDP Sciences, 2004
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