Propriétés magnétiques de NpSbTe et NpAsTe
1984
The magnetic properties of NpSbTe and NpAsTe have been studied. NpSbTe remains paramagnetic down to 1.8 K. NpAsTe is ferromagnetic below T c =25 K; the magnetization reaches 1.07 μ B /Np in a 40 kOe field but is not yet saturated. In the paramagnetic range, results for both compounds indicate a 3+valence state of Np ions. In the case of NpAsTe, results are in agreement with recent crystal field calculations, Mossbauer effect and electrical resistivity measurements NpSbTe reste paramagnetique jusqu'a 1,8 K; NpAsTe devient ferromagnetique au-dessous de T c =25 K et l'aimantation atteint 1,07 μ B /atom Nβ dans un champ magnetique de 40 kOe et n'est pas encore saturee. Determination d'un etat de valence+3 pour Np en phase paramagnetique
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