Anisotropic pinned/biased magnetization in $SrRuO_3/SrMnO_3$ superlattices

Details Anisotropic pinned/biased magnetization in $SrRuO_3/SrMnO_3$ superlattices Anisotropic pinned/biased magnetization in $SrRuO_3/SrMnO_3$ superlattices

2005-03-29

arxiv.org/abs/cond-mat/0503672v1

Eur. Phys. J. B 45 (2005) 169-173

Physics

Condensed Matter

Materials Science

To be published in Eur. Jour. Phys. B for a topical issue on "new trends in magnetic exchange bias phenomena"

Scientific paper

10.1140/epjb/e2005-00176-5

The exchange coupling at the interfaces of magnetic superlattices consisting of ferromagnetic $SrRuO_3$ and antiferromagnetic $SrMnO_3$ grown on (001) oriented $SrTiO_3$ is studied with in-plane and out-of-plane orientations, with respect to the substrate plane, of the cooling magnetic field. The magnetization of the in-plane, field cooled hysteresis loop is lower than the corresponding in-plane zero-field-cooled hysteresis loop. The out-of-plane field cooled hysteresis loop is shifted, from the origin, along the graphical magnetization axis. We attribute this irreversible rotation of the moment to the pinning/biasing of spin in the $SrRuO_3$ layer in the vicinity of interfaces by the antiferromagnetic $SrMnO_3$ layer.

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