The XV^th International Conference on low temperature physics
Quantum Fluids and Solids
Superconductivity

J. Phys. Colloques 39 (1978) C6-798-C6-799
DOI: 10.1051/jphyscol:19786356

NUCLEAR INDUCED FERROMAGNETISM IN Pr Cu₅

J.L. Genicon, J.L. Tholence and R. Tournier

Centre de Recherches sur les Très Basses Températures, C.N.R.S., B.P. 166 X, 38042 Grenoble Cedex, F.

Résumé
Nous avons observé dans le composé de Van Vleck Pr Cu₅, l'apparition à basse température d'un ordre ferromagnétique nucléaire ; la température de Curie T_c est de 24 mK. Au dessus de T_c, l'énorme décroissance du renforcement de la constante de Curie nucléaire d'un facteur 180 avec le champ appliqué ne peut être expliquée qu'en tenant compte d'interactions indirectes entre les noyaux de Pr.

Abstract
In the Van Vleck compound PrCu₅, we have observed, at low temperature, a nuclear ferromagnetic ordering with a Curie temperature of 24 mK. Above T_c, to explain the huge decrease by a factor 180 of the enhanced nuclear Curie constant with the applied magnetic field, one has to take into account indirect interactions between Pr nuclei.

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