Anomalous Hall effect in distorted kagome magnets (Nd, Sm)Mn$_6$Sn$_6$

TL;DR

This study investigates the magnetic and electrical properties of NdMn$_6$Sn$_6$ and SmMn$_6$Sn$_6$, revealing a significant intrinsic anomalous Hall effect originating from their distorted kagome lattices, similar to heavy-R counterparts.

Contribution

It demonstrates that distorted Mn-based kagome lattices in these compounds produce a large intrinsic anomalous Hall effect, extending understanding from pristine kagome systems.

Findings

Large intrinsic anomalous Hall effect observed

AHE comparable to heavy-R kagome compounds

AHE originates from Mn-based kagome lattice

Abstract

We report magnetic and electrical properties for single crystals of NdMn$_6$Sn$_6$ and SmMn$_6$Sn$_6$. They crystallize into a structure which has distorted, Mn-based kagome lattices, compared to the pristine kagome lattices in heavy-rare-earth-bearing RMn$_6$Sn$_6$ compounds. They are hightemperature ferromagnets of which the R moment is parallel with the Mn moment. We observed a large intrinsic anomalous Hall effect (AHE) that is comparable to the ferrimagnetic, heavy-R siblings in a wide range of temperature. We conclude that their intrinsic AHE is stemming from the Mn-based kagome lattice, just as in the heavy RMn$_6$Sn$_6$.