Specific heat of the antiferro / ferro-magnet NpGa3

Abstract The specific heat of NpGa 3 has been measured for the first time. The magnetic transitions and more generally the full magnetic phase diagram have been re-established precisely. The Sommerfeld coefficient and the magnetic entropy point to a rather localized system, in agreement with previous studies, in particular high pressure Mossbauer and resistivity. The comparison with other NpX 3 suggests that NpGa 3 is the most localized member of the series.