| Issue |
J. Phys. Colloques
Volume 40, Number C4, Avril 1979
3rd International Conference on the electronic structure of the actinides
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|---|---|---|
| Page(s) | C4-82 - C4-83 | |
| DOI | https://doi.org/10.1051/jphyscol:1979427 | |
J. Phys. Colloques 40 (1979) C4-82-C4-83
DOI: 10.1051/jphyscol:1979427
Magnetic and magnetoelastic properties of the UGa2 intermetallic compound
A.V. Andreev1, K.P. Belov2, A.V. Deriagin1, R.Z. Levitin2 et A. Me”ovský31 Ural State University, Sverdlovsk, U.S.S.R.
2 Moscow State University, Moscow, U.S.S.R.
3 Charles University, Prague, C.S.S.R.
Résumé
Dans l'état ferromagnétique (Tc = 125 K) on a observé une distorsion orthorhombique de la maille du réseau cristallin hexagonal due à la grande magnétostriction (λγ.2 = - 4 × 10-3 à 4,2 K) et aussi à la grande anisotropie magnétocristalline (K = - 2 x × 107 erg/g à 4,2 K). Le moment magnétique de U diffère de celui de l'ion libre qui a une valence différente, probablement à cause de la délocalisation des électrons 5f.
Abstract
In the ferromagnetic state of the UGa2 (Tc = 125 K) the rhombic distortions of the hexagonal lattice due to the great mgnetostriction (λγ.2 = - 4 × at 4.2 K) as well as the large magnetocrystalline anisotropy (K = - 2 × 107 erg/g at 4.2 K) were founded. The magnetic moment per U-atom (µU = 2. 71 µB) is different from one for a free ion of different valency, that may be caused by partial delocalization of the 5f-electrons.