Volume 34, Number 6, May III 1996
|Page(s)||459 - 464|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Enhanced exchange in the itinerant ferromagnet UFe2
European Commission, Joint Research Center, Institute for Transuranium Elements
Postfach 2340, D-76125 Karlsruhe, Germany
2 Département de Recherche Fondamentale sur la Matière Condensée, SPSMS/MDN CEA-Grenoble, F-38054 Grenoble Cedex 9, France
3 Physics Department, Brookhaven National Laboratory - Long Island, NY 11973, USA
4 Dipartimento di Scienze dei Materiali e della Terra, Università di Ancona, and Istituto Nazionale Fisica della Materia - Via Brecce Bianche, I-60131 Ancona, Italy
5 Physics Department, Risø National Laboratory - DK-4000 Roskilde, Denmark
6 Institut Laue-Langevin - 156 X, F-38042 Grenoble Cedex 9, France
7 Université J. Fourier - F-38000 Grenoble, France
Accepted: 25 March 1996
Neutron inelastic-scattering experiments on the itinerant ferromagnet have shown that the strong hybridization between the U and Fe electrons results in a number of major changes compared to the physics of the isostructural , and Er) compounds. We have observed that the Fe-Fe exchange interaction in this compound is actually greater at low temperature than it is in pure iron. This situation is not found in the compounds. Excitations involving the U moments are heavily damped. We conclude with remarks on the possibility of synthesizing compounds with high Curie temperatures containing uranium.
PACS: 75.30.Ds – Spin waves / 75.30.Et – Exchange and superexchange interactions / 75.50.Bb – Fe and its alloys
© EDP Sciences, 1996
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