2025/03/14 by Yu Yamane, Yamane, Yu, Takahiro Onimaru +9 · 1 citation
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #Thermal Expansion and Ionic Conductivity
paper · pdf · doi:10.48550/arxiv.2503.11540
openalex publication_date 2025/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A diluted non-Kramers doublet system Y1-xPrxIr2Zn20 is a promising candidate for exhibiting single-site quadrupolar (two-channel) Kondo effect. We have measured temperature-dependent magnetization of a sample for x = 0.028 down to 0.1 K at various constant magnetic fields to extract the characteristic behaviors due to the quadrupolar Kondo effect. The Curie--Weiss fit to the magnetic susceptibility between 50 and 300 K yields a negative paramagnetic Curie temperature of -7.0 K, indicative of on-site antiferromagnetic interaction. The magnetization divided by magnetic field, M(T)/B, at B = 0.5 T is saturated to a constant value below 3 K. On the contrary, in higher magnetic fields of B = 1 and 2 T, M(T)/B exhibits -lnT dependence from 1 to 0.1 K, which temperature dependence is consistent with that of the quadrupolar susceptibility detected from ultrasonic measurements. The -lnT form of M(T)/B appears to reflect the behavior of quadrupolar susceptibility, through the magnetic-field-induced magnetic moment due to the mixing of the non-Kramers doublet and crystalline-electric-field excited states of Pr3+. In B = 4 T, M(T)/B approaches a constant on cooling below 0.3 K, because of the quenching of the quadrupoles in the field-induced singlet ground state.