首页|Non-Kramers doublet ground state in a quaternary cubic compound PrRu2In2Zn18 investigated by ultrasonic measurements

Non-Kramers doublet ground state in a quaternary cubic compound PrRu2In2Zn18 investigated by ultrasonic measurements

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We performed ultrasonic measurements on a quaternary cubic compound PrRu2In2Zn18 to explore the ground state properties derived from non-Kramers Γ3 doublet of Pr3+.PrRu2In2Zn18 is a quaternary derivative of the ternary compound PrRu2Zn20 that exhibits a structural phase transition at Ts=138 K.In PrRu2In2Zn18,the Zn atoms at the 16c site in PrRu2Zn20 are selectively replaced by In atoms.A monotonic increase was observed in the temperature dependence of elastic constants CL=(C11+2C12+4C44)/3 and CT=(C11-C12+C44)/3 in the temperature range around Ts to which an elastic softening was observed in(C11-C12)/2 for PrRu2Zn20.The disappearance of the softening indicates that the structural transition in PrRu2Zn20 is suppressed by the substitution of Zn ions by In ones with a larger ionic radius.Alternatively,the CT of PrRu2In2Zn18 exhibits a precursor Curie-type elastic softening toward low temperatures being responsible for the non-Kramers Γ3 ground state.We discuss the ground state and the evolution of the elastic properties of the different single-crystal samples of PrRu2In2Zn18 grown under different conditions.

ultrasonic measurementsnon-Kramers doubletstructural phase transitioncrystalline electric field effect

张化远、Kazuhei Wakiya、Mitsuteru Nakamura、Masahito Yoshizawa、Yoshiki Nakanish

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Graduate School of Science and Engineering,Iwate University,Morioka 020-8551,Japan

Soft-Path Science and Engineering Research Center(SPERC),Iwate UniversityJSPS KAKENHIJSPS KAKENHIJSPS KAKENHI

JP18K03530JP21K04622JP21K13869

2024

10.1088/1674-1056/ad35af

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(6)
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