We performed field-angle-resolved magnetostriction and thermal-expansion measurements on ${\mathrm{PrIr}}_2{\mathrm{Zn}}_{20}$, a cubic non-Kramers compound exhibiting antiferroquadrupolar order below $T_{\mathrm{Q}}=0.125\mathrm{K}$. 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 $O_{20}$ 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.

Close

PrevNext

View figure in article

• Kondo effect
• Magnetostriction
• Multipole order
• Thermal expansion
• Strongly correlated systems