Distinct topological Hall responses in CeCu$_2$-type EuZn$_2$ and EuCd$_2$ films

Yuto Watanabe; Shinichi Nishihaya; Markus Kriener; Ayano Nakamura; Masaki Uchida

paper

Distinct topological Hall responses in CeCu $_{2}$ -type EuZn $_{2}$ and EuCd $_{2}$ films

arXiv:2411.03650

Abstract

Rare earth intermetallic compounds crystallized in AlB $_{2}$ -type and its low-symmetry derivative CeCu $_{2}$ -type structures potentially host diverse frustrated magnetic structures and rich magnetotransport phenomena. We report the film growth of CeCu $_{2}$ -type EuZn $_{2}$ by molecular beam epitaxy and the observation of topological Hall responses highly contrastive to isostructural EuCd $_{2}$ . While their magnetization curves are rather similar, the topological Hall effect observed in EuZn $_{2}$ is simpler, with the only one component enhanced at the magnetic transition field. EuZn $_{2}$ may be a unique system for studying the magnetic domain boundary effect on topological Hall responses among the CeCu $_{2}$ -type rare-earth intermetallic compounds.

12 pages, 4 figures

Distinct topological Hall responses in CeCu2​-type EuZn2​ and EuCd2​ films

Abstract

Distinct topological Hall responses in CeCu $_{2}$ -type EuZn $_{2}$ and EuCd $_{2}$ films