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Magnetic Properties of C15 the Laves-phase Compound SmRu2
Yusuke Amakai,Mototsugu Sato,Shigeyuki Murayama,Naoki Momono,Hideaki Takano 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
We report the magnetic properties of the polycrystalline C15 Laves-phase rare-earth compoundSmRu2. The sample of SmRu2 was made by using an arc-melt method and was annealed under500 C in vacuumed quartz tube for 50 hours. The magnetic susceptibility χ of SmRu2 followsa Curie-Weiss law at temperature above 80 K. The effective paramagnetic moment peff is 1.39µB/Sm-atom, and the Weiss temperature has a positive value of 42 K. The low-temperature χ forT < 60 K increases rapidly with decreasing temperature. In the resistivity and the specific heatCp, we found an inflection and a jump, respectively, at about 55 K. Furthermore, we observed ahysteresis in the magnetic field dependence of the magnetization at 2 K. These experimental resultssuggest that the C15 Laves-phase compound SmRu2 is a ferromagnetic material with TC 55 K.