論文

査読有り
2019年7月9日

Theory of standing spin waves in a finite-size chiral spin soliton lattice

Physical Review B
  • J. Kishine
  • ,
  • Vl E. Sinitsyn
  • ,
  • I. G. Bostrem
  • ,
  • Igor Proskurin
  • ,
  • F. J.T. Goncalves
  • ,
  • Y. Togawa
  • ,
  • A. S. Ovchinnikov

100
2
開始ページ
024411
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.100.024411
出版者・発行元
AMER PHYSICAL SOC

We present a theory of standing spin waves (SSW) in a monoaxial chiral helimagnet. Motivated by experimental findings on the magnetic-field dependence of the resonance frequency in thin films of CrNb3S6 [Goncalves, Phys. Rev. B 95, 104415 (2017)10.1103/PhysRevB.95.104415], we examine the SSW over a chiral soliton lattice (CSL) excited by an ac magnetic field applied parallel and perpendicular to the chiral axis. For this purpose, we generalize Kittel-Pincus theories of the SSW in ferromagnetic thin films to the case of a noncollinear helimagnet with the surface end spins, which are softly pinned by an anisotropy field. Consequently, we found that there appear two types of modes. One is a Pincus mode that is composed of a long-period Bloch wave and a short-period ripple originated from the periodic structure of the CSL. Another is a short-period Kittel ripple excited by space-periodic perturbation, which exists only in the case in which the ac field is applied perpendicular the chiral axis. We demonstrate that the existence of the Pincus mode and the Kittel ripple is consistent with the experimentally found double resonance profile.


リンク情報
DOI
https://doi.org/10.1103/PhysRevB.100.024411
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000474884500002&DestApp=WOS_CPL
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85073654469&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85073654469&origin=inward
ID情報
  • DOI : 10.1103/PhysRevB.100.024411
  • ISSN : 2469-9950
  • eISSN : 2469-9969
  • SCOPUS ID : 85073654469
  • Web of Science ID : WOS:000474884500002

エクスポート
BibTeX RIS