Europhys. Lett., 60 (4) , pp. 608-614 (2002)
Experimental evidence of the ferrimagnetic ground state of probed by X-ray magnetic circular dichroismM. Besse1, V. Cros1, A. Barthélémy1, H. Jaffrès1, J. Vogel2, F. Petroff1, A. Mirone3, A. Tagliaferri3, P. Bencok3, P. Decorse4, P. Berthet4, Z. Szotek5, W. M. Temmerman5, S. S. Dhesi3, N. B. Brookes3, A. Rogalev3 and A. Fert1
1 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
(Received 15 July 2002; accepted in final form 5 September 2002)
We have investigated the magnetic structure of a single crystal by X-ray magnetic circular dichroism at the L2,3 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.
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