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Symmetry of magnetic structures: the case of CeAl2

Published online by Cambridge University Press:  22 February 2007

J. Schweizer ,
J. Villain  and
A. B. Harris
J. Schweizer*
Affiliation:
Département de Recherche Fondamentale sur la Matière Condensée D.S.M., Commissariat à l'Énergie Atomique, 17 avenue des Martyrs, 38054 Grenoble Cedex 9, France
J. Villain
Affiliation:
Département de Recherche Fondamentale sur la Matière Condensée D.S.M., Commissariat à l'Énergie Atomique, 17 avenue des Martyrs, 38054 Grenoble Cedex 9, France
A. B. Harris
Affiliation:
Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, 19104, USA
*
jacques.schweizer@cea.fr
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Abstract

This article presents a group-theoretical investigation of an incommensurate magnetic structure in the case where the crystal structure is centrosymmetric while the structure vector k is not conserved by inversion. A first method starts with the conventional group-theoretical treatment taking into account the transformations which conserve k and then combines the solutions to obtain a centrosymmetric and real magnetization. A second method includes inversion in the group-theoretical treatment, for instance by introducing the complex conjugation operator and corepresentations. The general theory is applied to CeAl2 with the scope of improving the knowledge of its magnetic structure.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 38 , Issue 1 , April 2007 , pp. 41 - 46
Copyright
© EDP Sciences, 2007

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