We have investigated the specific heat and magnetic properties of superstoichiometric samarium dihydride (SmH2.16). The temperature (T) dependence of the specific heat (Cp) has three peaks at 7.1, 10.8 and 15.9 K. Below 7.1 K, C / T is an almost linear function of T2. The Sommerfeld coefficient γLT of the electronic specific heat below 7.1 K is 150 mJ / (K2 mole). SmH2.16 exhibits coexistence of heavy-fermion behavior and magnetic ordering. The temperature dependence of the magnetic susceptibility can be explained by a valence ratio of 75% Sm3 +, while the Shottky contribution of the specific heat can be explained by a valence ratio of 60% Sm3 +. The reason why the amount of Sm3 + and the lattice constant of SmH2.16 are small compared with SmH2 is not yet clear.
- Magnetic susceptibility
- Samarium dihydride
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics