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 ∥ , which is smaller than the estimated value from mean-field approximation assuming the Γ8 quartet crystal-electric-field ground state and simple antiferromagnetic order. We found that the elastic constant C44 shows 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.
|ジャーナル||Journal of Physics: Conference Series|
|出版ステータス||Published - 2016 2月 5|
|イベント||TMU International Symposium on New Quantum Phases Emerging from Novel Crystal Structure - Tokyo, Japan|
継続期間: 2015 9月 24 → 2015 9月 25
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