Abstract
We report the magnetic properties of the polycrystalline C15 Laves-phase rare-earth compound SmRu2. The sample of SmRu2 was made by using an arc-melt method and was annealed under 500 °C in vacuumed quartz tube for 50 hours. The magnetic susceptibility χ of SmRu2 follows a Curie-Weiss law at temperature above 80 K. The effective paramagnetic moment p eff is 1.39 µ B /Sm-atom, and the Weiss temperature θ has a positive value of 42 K. The low-temperature χ for T < 60 K increases rapidly with decreasing temperature. In the resistivity ρ and the specific heat C p , we found an inflection and a jump, respectively, at about 55 K. Furthermore, we observed a hysteresis in the magnetic field dependence of the magnetization at 2 K. These experimental results suggest that the C15 Laves-phase compound SmRu2 is a ferromagnetic material with T C ∼ 55 K.
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