The low temperature specific heat of NpOs2 and NpRu2 |
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| Affiliation: | 1. Laboratoire de Physique de la Matière Condensée, Faculté des Sciences Ben M’sik, Hassan II University of Casablanca, Casablanca B.P. 7955, Morocco;2. Dipartimento di Chimica e Chimica Industriale dell’Università di Genova and CNR-IMEM, via Dodecaneso 33, Genova 16146, Italy;3. Laboratoire de Physique et Chimie Théoriques (LPCT), Université de Lorraine and CNRS, UMR 7036, Vandoeuvre-lès-Nancy 54500, France |
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| Abstract: | Specific heat measurements on NpOs2 show a peak at Tc = 7.9 ± 0.1 K, and γ = 90 mJ/(mol K2) above Tc. The magnetic entropy, 0.2 R 1n 2, supports previous arguments for itinerant ferromagnetism. The data for NpRu2, supposedly a spin fluctuation compound, are fit below 10 K by C/T = γ + BT2, with γ = 118 mJ/(mol K2) and B corresponding to θD = 174 K. |
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