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

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

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

Materials Science 2024-11-07 v1 Strongly Correlated Electrons

Authors: Yuto Watanabe , Shinichi Nishihaya , Markus Kriener , Ayano Nakamura , Masaki Uchida

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.

Keywords

topological Hall effect CeCu₂-type structure EuZn₂ EuCd₂ molecular beam epitaxy magnetotransport magnetic domain boundary rare earth intermetallic compounds

Cite

@article{arxiv.2411.03650,
  title  = {Distinct topological Hall responses in CeCu$_2$-type EuZn$_2$ and EuCd$_2$ films},
  author = {Yuto Watanabe and Shinichi Nishihaya and Markus Kriener and Ayano Nakamura and Masaki Uchida},
  journal= {arXiv preprint arXiv:2411.03650},
  year   = {2024}
}

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12 pages, 4 figures

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

Abstract

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