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

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number094705
Journaljournal of the physical society of japan
Volume88
Issue number9
DOIs
Publication statusPublished - 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Unique magnetic phases in the skyrmion lattice and Fermi surface properties in cubic chiral antiferromagnet Euptsi'. Together they form a unique fingerprint.

Cite this