Effect of Ga Substitution on the Γ3 Doublet Ground State in PrIr2Zn20

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

Onimaru, Takahiro^1 ; Uenishi, Kazuto^1 ; Yamane, Yu^1 ; Wakiya, Kazuhei^1 ; Matsumoto, Keisuke T.^1 ; Umeo, Kazunori^2 ; Takabatake, Toshiro^1,3

Department of Quantum Matter, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima

739-8530, Japan^1

Cryogenics and Instrumental Analysis Division, N-BARD, Hiroshima University, Higashi-Hiroshima

739-8526, Japan^2

Institute for Advanced Materials Research, Hiroshima University, Higashi-Hiroshima

739-8530, Japan^3

关键词: Doublet ground state;    Ga substitutions;    Ground-state doublet;    Local symmetry;    Magnetic entropy;    Orders of magnitude;    Residual value;    Two-level models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/683/1/012011/pdf
DOI  :  10.1088/1742-6596/683/1/012011

来源: IOP

【 摘 要 】

Electrical resistivity ρ, specific heat C, and magnetic susceptibility χ measurements are reported on PrIr2Zn20-xGaxfor x=0.5 and 1.0. On cooling, ρ(T)'s monotonically decrease to the residual values which are two orders of magnitudes larger than that of PrIr2Zn20. A broad hump in Cm(T)'s at around 10 K can be reproduced by the two-level model with the Γ3doublet ground state and the Γ4triplet excited state. The magnetic entropy release shifts to higher temperatures with increasing x. The increase in χ(T) at T