The exchange coupling at the interfaces of magnetic superlattices consisting of ferromagnetic SrRuO3 and antiferromagnetic SrMnO3 grown on (001) oriented SrTiO3 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 SrRuO3 layer in the vicinity of interfaces by the antiferromagnetic SrMnO3 layer.
@article{arxiv.cond-mat/0503672,
title = {Anisotropic pinned/biased magnetization in $SrRuO_3/SrMnO_3$ superlattices},
author = {P. Padhan and W. Prellier},
journal= {arXiv preprint arXiv:cond-mat/0503672},
year = {2009}
}
Comments
To be published in Eur. Jour. Phys. B for a topical issue on "new trends in magnetic exchange bias phenomena"