| Issue |
Europhys. Lett.
Volume 55, Number 2, July 2001
|
|
|---|---|---|
| Page(s) | 267 - 272 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2001-00409-9 | |
| Published online | 01 December 2003 | |
Spin and orbital moments in itinerant magnets
1
Institut Laue Langevin - B.P. 156, 38042 Grenoble,
Cedex 9, France
2
Département de Recherche Fondamentale sur la Matière Condensée
CEA-Grenoble - 38054 Grenoble, France
3
European Commission, JRC, Institute for Transuranium Elements
Postfach 2340, D-76125 Karlsruhe, Germany
4
W. Trzebiatowski Institute or Low Temperature and Structure
Research Polish Academy of Sciences - P.O. Box 937, 50-950
Wroclaw, Poland
Received:
25
January
2001
Accepted:
15
May
2001
Itinerant magnets with large orbital moments are uncommon. We show
that 
is such a material where the itinerant magnetism is carried
by the 5f states. The definitive evidence comes from
neutron diffraction measurements of the magnetization distribution,
where a significant difference is observed in the momentum dependence
of the scattering amplitude above and below TN. The change in the
magnetization distribution when the antiferromagnetic order appears is
due to the antiparallel coupling of large atomic 5f spin and orbital
moments below TN, whereas above TN there is spin degeneracy and no
disordered local moments.
PACS: 75.10.-b – General theory and models of magnetic ordering / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 71.15.Mb – Density functional theory, local density approximation, gradient and other corrections
© EDP Sciences, 2001
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