Volume 35, Number 2, July II 1996
|Page(s)||121 - 126|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Magnetic phase diagram of USb at high pressure
Département de Recherche Fondamentale sur la Matière Condensée, SPSMS/LCP
CEA/Grenoble - 17 rue des Martyrs, 35054 Grenoble Cedex 9, France
2 Laboratoire Léon Brillouin, CEA-CNRS, CEA/Saclay - 91191 Gif sur Yvette, France
3 Russian Research Centre "Kurchatov Institute" - 123182 Moscow, Russia
4 The Oarai Branch, Institute for Materials Research, Tohoku University Oarai, Ibaraki 311-13, Japan
5 Laboratorium für Festkörperphysik, ETH - CH-8093 Zürich, Switzerland
Accepted: 20 May 1996
High-pressure resistance and neutron scattering measurements have been performed on single crystals of USb. It is shown that the effect of pressure is to reduce the ordering temperature of the antiferromagnetic triple-k phase at a rate of -17 K/GPa. This phase exists at least up to 6 GPa. However, above 2 GPa, a second magnetic phase transition occurs at low temperature, below about 80 K. From the neutron data, the new phase is found to have the same wave vector, , as the triple-k structure, but a careful analysis of domain population effects suggests that it is most likely single-k. The appearance of a single-k structure at low temperature, while a multi-k structure is stable at a higher temperature, is at variance with the behaviour normally encountered in this type of systems. However, it is shown to fit into a unified phase diagram of the uranium monopnictides.
PACS: 75.30.-m – Magnetically ordered materials: other intrinsic properties / 25.40.Dn – Elastic neutron scattering / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.)
© EDP Sciences, 1996
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