| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-1037 - C8-1038 | |
| DOI | https://doi.org/10.1051/jphyscol:19888473 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1037-C8-1038
DOI: 10.1051/jphyscol:19888473
1 Laboratoire Physique des Solides, INSA, Av. de Rangueil, 31077 Toulouse Cedex, France
2 Centre de Recherche sur les Très Basses Températures, BP 166X, 38042 Grenoble Cedex, France
3 Laboratoire de Chimie des Matériaux Inorganiques, LOE, BP 4347, 31055 Toulouse Cedex, France.
J. Phys. Colloques 49 (1988) C8-1037-C8-1038
DOI: 10.1051/jphyscol:19888473
DYNAMIC BEHAVIOUR OF SMALL γFe2O3 CRYSTALLITES. COMPARISON WITH SPIN GLASSES
R. Bendaoud1, A. R. Fert1, J. L. Tholence2, J. Souletie2 et A. Rousset31 Laboratoire Physique des Solides, INSA, Av. de Rangueil, 31077 Toulouse Cedex, France
2 Centre de Recherche sur les Très Basses Températures, BP 166X, 38042 Grenoble Cedex, France
3 Laboratoire de Chimie des Matériaux Inorganiques, LOE, BP 4347, 31055 Toulouse Cedex, France.
Abstract
A.C. susceptibility measurements are performed on small γFe2O3 crystallites and analysed by the William Landel Ferry method used for viscoelastic polymers. Temperature dependence of the shift factor is consistant with a relaxation time τ (T) which follows an Arrhenius law with an activation energy E/k = 5 013 K.