Experimental evidence of the ferrimagnetic ground state of probed by X-ray magnetic circular dichroism

M. Besse; V. Cros; A. Barthélémy; H. Jaffrès; J. Vogel; F. Petroff; A. Mirone; A. Tagliaferri; P. Bencok; P. Decorse; P. Berthet; Z. Szotek; W. M. Temmerman; S. S. Dhesi; N. B. Brookes; A. Rogalev; A. Fert

doi:10.1209/epl/i2002-00262-4

All issues

Volume 60 / No 4 (November 2002)

Europhys. Lett., 60 4 (2002) 608-614

Abstract

Issue		Europhys. Lett. Volume 60, Number 4, November 2002


Page(s)		608 - 614
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2002-00262-4
Published online		01 November 2002

Europhys. Lett., 60 (4), pp. 608-614 (2002)

Experimental evidence of the ferrimagnetic ground state of $\chem{Sr_2FeMoO_6}$ probed by X-ray magnetic circular dichroism

M. 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: 5 September 2002

Abstract

We have investigated the magnetic structure of a $\chem{Sr_2FeMoO_6}$ single crystal by X-ray magnetic circular dichroism at the $L_{2,3}$ edges of $\chem{Fe}$ and $\chem{Mo}$ sites. The spin magnetic moments we find on $\chem{Fe}$ $(3.05\mu_{\ab{B}})$ and $\chem{Mo}$ $(-0.32\mu_{\ab{B}})$ give, for the first time, a direct confirmation of their ferrimagnetic ordering. The presence of a finite spin moment on $\chem{Mo}$ together with only very small orbital moments on both $\chem{Fe}$ and $\chem{Mo}$ confirms that the predicted half-metallicity of the $\chem{Sr_2FeMoO_6}$ compound is due to a configuration with five localized d electrons forming a high-spin moment on $\chem{Fe}$ and one s antiparallel delocalized electron shared between the $\chem{Mo}$ 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

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