TY - JOUR
T1 - Unique magnetic phases in the skyrmion lattice and Fermi surface properties in cubic chiral antiferromagnet Euptsi
AU - Kakihana, Masashi
AU - Aoki, Dai
AU - Nakamura, Ai
AU - Honda, Fuminori
AU - Nakashima, Miho
AU - Amako, Yasushi
AU - Takeuchi, Tetsuya
AU - Harima, Hisatomo
AU - Hedo, Masato
AU - Nakama, Takao
AU - Ōnuki, Yoshichika
N1 - Funding Information:
We are very grateful to helpful discussions with H. Kawamura and K. Kaneko. This work was supported by JSPS KAKENHI Grant Nos. JP18H04329, JP17K05547, JP16K05453, JP15H05884, JP15H05882, and JP15H05886, and Grant-in-Aid for JSPS Research Fellow No. JP18J15180.
Publisher Copyright:
© 2019 The Physical Society of Japan.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
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U2 - 10.7566/JPSJ.88.094705
DO - 10.7566/JPSJ.88.094705
M3 - Article
AN - SCOPUS:85071256193
VL - 88
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 9
M1 - 094705
ER -