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M. Rotter, M. Loewenhaupt, M. Doerr, A. Lindbaum, H. Sassik, K. Ziebeck, B. Beuneu:
"Dipole interaction and magnetic anisotropy in gadolinium compounds";
Physical Review B, 68 (2003), S. 144418-1 - 144418-7.

Dipole interaction and magnetic anisotropy in gadolinium compounds

M. Rotter Institut für Physikalische Chemie, Universität Wien, A?1090 Wien, Austria
Institut für Festkörperphysik, Technische Universität Dresden, D?01062 Dresden, Germany

M. Loewenhaupt and M. Doerr Institut für Festkörperphysik, Technische Universität Dresden, D?01062 Dresden, Germany

A. Lindbaum and H. Sassik Institut für Festkörperphysik, Technische Universität Wien, Wiedner Hauptstraße 8?10, A?1040 Wien, Austria

K. Ziebeck Department of Physics, Loughborough University, Loughborough, LE 11 3TK, United Kingdom

B. Beuneu Laboratoire Léon Brillouin, CEA-CNRS, Saclay, 91191 Gif sur Yvette Cedex, France

(Received 2 June 2003; published 15 October 2003)

The influence of the dipole interaction on the magnetic anisotropy of Gd compounds is investigated. Available data on ferromagnets and antiferromagnets with different crystal structures are discussed and complemented by new neutron scattering experiments on GdCu2In, GdAu2Si2, GdAu2, and GdAg2. If the propagation vector of the magnetic structure is known, the orientation of the magnetic moments as caused by the dipole interaction can be predicted by a straightforward numerical method for compounds with a single Gd atom in the primitive unit cell. The moment directions found by magnetic diffraction on GdAu2Si2, GdAu2, GdAg2, GdCu2Si2, GdNi2B2C, GdNi2Si2, GdBa2Cu3O7, GdNi5, GdCuSn, GdCu2In, GdCu4In, and GdX (X = Ag, Cu, S, Se, Sb, As, Bi, P) are compared to the predicted directions resulting in an almost complete accordance. Therefore, the dipole interaction is identified as the dominating source of anisotropy for most Gd compounds. The numerical method can be applied to a large number of other compounds with zero angular momentum. ©2003 The American Physical Society

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