2025/11/26 by Naoki Okamoto, Yohei Kono, Okamoto, Naoki +9
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #Thermal Expansion and Ionic Conductivity
paper · pdf · doi:10.48550/arxiv.2511.21039
We performed field-angle-resolved magnetostriction and thermal-expansion measurements on PrIr2Zn20, a cubic non-Kramers compound exhibiting antiferroquadrupolar order below T\rm Q=0.125 K. Thermal expansion exhibits two qualitatively different anomalies under magnetic fields applied along the [001] direction, providing experimental support for the existence of an intermediate A phase previously reported. Furthermore, comparison between the experimental results and theoretical modeling indicates a strong anisotropic coupling of the O20 quadrupolar moment, which plays a key role in stabilizing the A phase. These findings demonstrate that multipolar states in non-Kramers systems can be effectively tuned by magnetic-field orientation, providing insights into the anisotropic nature of quadrupolar interactions.