Volume 60, Number 4, November 2002
|Page(s)||608 - 614|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2002|
Experimental evidence of the ferrimagnetic ground state of probed by X-ray magnetic circular dichroism
Unité mixte de Physique CNRS/THALES
Domaine de Corbeville, 91404 Orsay Cedex, France and Université Paris
Sud - 91405 Orsay Cedex, France
2 Laboratoire Louis Néel - B.P. 166, 38042 Grenoble Cedex, France
3 European Synchrotron Radiation Facility (ESRF) B.P. 220, 38043 Grenoble Cedex, France
4 Laboratoire de Physico-Chimie de l'Etat Solide Bâtiment 410, 91405 Orsay Cedex, France
5 Daresbury Laboratory - Daresbury, Warrington WA4 4AD, Cheshire, UK
Accepted: 5 September 2002
We have investigated the magnetic structure of a single crystal by X-ray magnetic circular dichroism at the edges of and sites. The spin magnetic moments we find on and give, for the first time, a direct confirmation of their ferrimagnetic ordering. The presence of a finite spin moment on together with only very small orbital moments on both and confirms that the predicted half-metallicity of the compound is due to a configuration with five localized d electrons forming a high-spin moment on and one s antiparallel delocalized electron shared between the and the other sites.
PACS: 75.70.Cn – Interfacial magnetic properties (multilayers) / 68.37.-d – Microscopy of surfaces, interfaces, and thin films / 75.70.Rf – Surface magnetism
© EDP Sciences, 2002
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