While recent theoretical studies have positioned noncollinear polar magnets with Cnv symmetry as compelling candidates for realizing topological magnetic phases and substantial intrinsic anomalous Hall conductivity, experimental realizations of the same in strongly correlated systems remain rare. Here, we present a large intrinsic anomalous Hall effect and extended topological magnetic ordering in Gd3Ni8Sn4 with hexagonal C6v symmetry. Observation of topological Hall response, corroborated by metamagnetic anomalies in isothermal magnetization, peak/hump features in field-evolution of ac susceptibility and longitudinal resistivity, attests to the stabilization of skyrmion A-phase. The anomalous Hall effect is quantitatively accounted for by the intrinsic Berry curvature-mediated mechanism. Our results underscore polar magnets as a promising platform to investigate a plethora of emergent electrodynamic responses rooted in the interplay between magnetism and topology.
@article{arxiv.2411.09300,
title = {Large anomalous Hall effect and \textit{A}-phase in hexagonal polar magnet Gd$_3$Ni$_8$Sn$_4$},
author = {Arnab Bhattacharya and Afsar Ahmed and Apurba Dutta and Ajay Kumar and Anis Biswas and Yaroslav Mudryk and Indranil Das},
journal= {arXiv preprint arXiv:2411.09300},
year = {2024}
}