Magnetic Instability of Pr3Ru4Sn13

2023/10/06 by Takanori Taniguchi, Taniguchi, Takanori, Shinnosuke Kitayama +11
Physics and Astronomy · Materials Science · Earth and Planetary Sciences · #Rare-earth and actinide compounds #Magnetic Properties of Alloys #High-pressure geophysics and materials

paper · pdf · doi:10.48550/arxiv.2310.04049

Abstract

We report on the quantum criticality of Pr₃Ru₄Sn₁₃ revealed by our new material research. Pr₃Ru₄Sn₁₃ has been synthesized by flux growth and characterized by single X-ray, powder X-ray, and powder neutron diffraction measurements. The compound adopts a Yb₃Rh₄Sn₁₃-type structure with a cubic Pm3n. From the magnetization at 1 T, the effective magnetic moment was estimated to be 3.58 μ_B per Pr³⁺, suggesting that the magnetism is mainly contributed by Pr³⁺ ions. The specific heat and magnetization show an anomaly at T_N = 7.5 ~ K owing to the phase transition. The muon spin rotation and relaxation (μSR) time spectra exhibit clear oscillations below T_N. This suggests that the phase is magnetically ordered. The volume fraction of the magnetic phase estimated from the initial asymmetry is around ten percent. In addition, spin fluctuations were observed at low temperatures. These results provide microscopic evidence that the material is closest to the antiferromagnetically quantum critical point with a partial order among Pr₃T₄Sn₁₃ (T= Co, Ru, Rh).

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