Low-temperature study of the Sm-based compound SmOs2Zn20

TMU International Symposium on "New Quantum Phases Emerging from Novel Crystal Structure"

Tanahashi, M.^1 ; Adachi, K.^1 ; Sasahara, T.^1 ; Kase, N.^1 ; Nakano, T.^1 ; Takeda, N.^2

Graduate School of Science and Technology, Niigata University, Niigata

950-2181, Japan^1

Department of Materials Science and Technology, Niigata University, Niigata

9502181, Japan^2

关键词: Ferromagnetic transition temperatures;    Ferromagnetic transitions;    Low temperatures;    Magnetic entropy;    Metallic behaviors;    Sm compound;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/683/1/012019/pdf
DOI  :  10.1088/1742-6596/683/1/012019

来源: IOP

【 摘 要 】

We synthesized single crystals of Zn-based Sm-compound SmOs2Zn20. T-dependence of magnetization M(T) shows a sudden increase at the ferromagnetic transition temperature TC∼ 3 K. T-dependence of electrical resistivity ρ(T) shows typical metallic behavior. At TC, ρ(T) slightly decreases, which originates from the ferromagnetic transition. Specific heat C(T) shows a clear but broad anomaly at TC. Magnetic entropy Smag(T) at TCis about R ln 2, and suggests that a Γ7doublet of the J = 5/2 multiplet is the ground state.