Hall effect on nontrivial quadrupole order in quasi-kagome compound URhSn

TL;DR

This paper investigates the complex Hall effect phenomena in URhSn, a quasi-kagome compound with nontrivial quadrupole order, revealing unconventional transport behaviors linked to multipolar phases in 5f-electron systems.

Contribution

It uncovers unusual Hall effects and their relation to nontrivial quadrupole order in URhSn, advancing understanding of transport in multipolar 5f-electron materials.

Findings

Large anomalous Hall component along easy-magnetization axis

Sign reversal of Hall resistivity at low temperatures

Unusual Hall component not proportional to magnetic susceptibility

Abstract

This study focuses on the transport properties of the quasi-kagome compound URhSn, which exhibits successive phase transitions at TC =16 K (ferromagnetic phase) and TO =54 K (intermediate phase). A large anomalous Hall component is present along the easy-magnetization axis (H|| [0001]), and the Hall resistivity shows very complex temperature- and field-dependence, with a sign reversal at low temperatures. The Hall resistivity exhibits a nonlinear and unusual field-dependence. Interestingly, there exists an unusual Hall component that is not proportional to the magnetic susceptibility for H || [0001] in both the intermediate and ferromagnetic states. These results reveal unconventional transport properties of URhSn, providing important insights into nontrivial multipolar phases in 5f- electron systems.