High Magnetic Field Study of Elastic Constants of the Cage-structure Compound SmBe13

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

Mombetsu, S.^1 ; Murazumi, T.^1 ; Hiura, K.^1 ; Yamazaki, S.^1 ; Shimizu, Y.^2 ; Hidaka, H.^1 ; Yanagisawa, T.^1 ; Amitsuka, H.^1 ; Yasin, S.^3,4 ; Zherlitsyn, S.^3 ; Wosnitza, J.^3

Department of Physics, Hokkaido Universsity, Sapporo

060-0810, Japan^1

Institute for Solid State Physics, University of Tokyo, Kashiwa

277-8581, Japan^2

Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Dresden

D-01314, Germany^3

American University of the Middle East (AUM), College of Engineering and Technology, Eqaila, Kuwait^4

关键词: Antiferromagnetic orderings;    Crystal electric field;    High magnetic fields;    Low temperatures;    Low-temperature state;    Mean field approximation;    Ordering temperature;    Pulsed magnetic fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/683/1/012032/pdf
DOI  :  10.1088/1742-6596/683/1/012032

来源: IOP

【 摘 要 】

Ultrasonic measurements were performed on the cage-structure compound SmBe13. We have investigated the magnetic field-temperature phase diagram of this material by using pulsed magnetic fields. We found that the low-temperature magnetic order is suppressed by a magnetic field of 43 T for H[001], which is smaller than the estimated value from mean-field approximation assuming the Γ8quartet crystal-electric-field ground state and simple antiferromagnetic order. We found that the elastic constant C44shows softening below the ordering temperature and has a local minimum below 7 T. These facts suggest that the low- temperature state is not a simple antiferromagnetically ordered state. In addition, no elastic anomaly due to rattling modes was found in the present measurements.