Unique magnetic phases in the skyrmion lattice and Fermi surface properties in cubic chiral antiferromagnet Euptsi

Masashi Kakihana, Dai Aoki, Ai Nakamura, Fuminori Honda, Miho Nakashima, Yasushi Amako, Tetsuya Takeuchi, Hisatomo Harima, Masato Hedo, Takao Nakama, Yoshichika Ōnuki

研究成果: Contribution to journalArticle査読

5 被引用数 (Scopus)

抄録

We measured the magnetization, ac susceptibility, Hall resistivity, and magnetoresistance for a cubic chiral anti-ferromagnet EuPtSi, and found the skyrmion lattice of the so-called “A-phase” in a wide field direction, except around H ∥ [110], together with a new skyrmion-related phase named the “B-phase” for H ∥ [001]. A large magnitude of a skyrmion-derived additional Hall resistivity is discussed on the basis of a small size of the skyrmion, 18 Å for H ∥ [111]. We also observed the de Haas–van Alphen oscillations and clarified the Fermi surface properties. Many nearly spherical Fermi surfaces are observed in EuPtSi, which are well explained by the results of full-potential linearized augmented plane wave band calculations for a non-4 f reference compound SrPtSi. The splitting energy of main two split Fermi surfaces named α and αA is determined as a large value of 1200 K, mainly reflecting the chiral (noncentrosymmetric) crystal structure and a large spin–orbit coupling of Pt-5d electrons.

本文言語英語
論文番号094705
ジャーナルjournal of the physical society of japan
88
9
DOI
出版ステータス出版済み - 2019
外部発表はい

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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