| Issue |
J. Phys. Colloques
Volume 41, Number C8, Août 1980
Fourth International Conference on Liquid and Amorphous Metals
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|
|---|---|---|
| Page(s) | C8-638 - C8-641 | |
| DOI | https://doi.org/10.1051/jphyscol:19808160 | |
Fourth International Conference on Liquid and Amorphous Metals
J. Phys. Colloques 41 (1980) C8-638-C8-641
DOI: 10.1051/jphyscol:19808160
1 Centre de Recherches Nucléaires, 67037 Strasbourg Cedex, France
2 L M S E S, 4, rue Blaise Pascal, U L P 67000 Strasbourg, France
J. Phys. Colloques 41 (1980) C8-638-C8-641
DOI: 10.1051/jphyscol:19808160
ELECTRONIC, MAGNETIC AND STRUCTURAL PROPERTIES OF AMORPHOUS Eu80Au20 ALLOYS FROM HYPERFINE INTERACTIONS AT EUROPIUM
J.M. Friedt1, M. Maurer1, J.P. Sanchez1, A. Berrada2, A. Qachaou2, P. Panissod2 et J. Durand21 Centre de Recherches Nucléaires, 67037 Strasbourg Cedex, France
2 L M S E S, 4, rue Blaise Pascal, U L P 67000 Strasbourg, France
Abstract
Amorphous Eu80Au20 has been investigated by means of Mössbauer spectroscopy and NMR at151Eu. A large electric field gradient (E F G) is detected. The E F G and isomer shift at Eu2 + ions reveal unusually large temperature dependences between 4.2 and 245 K. This feature is tentatively attributed to tunneling states, typical of amorphous materials. All the results are consistent with a strong structural short range order. The alloy orders asperomagnetically below Tc ≈ 85 K. The spontaneous magnetization, the hyper-fine field distribution and the reduced magnetization temperature dependence are consistently discussed in terms of distributions of moments directions and of exchange interactions.