Chiral excitation of spin waves in ferromagnetic films by magnetic nanowire gratings

Tao Yu, Chuanpu Liu, Haiming Yu, Yaroslav M. Blanter, Gerrit E.W. Bauer

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
100 Downloads (Pure)

Abstract

We theoretically investigate the interlayer dipolar and exchange couplings between an array of metallic magnetic nanowires grown on top of an extended ultrathin yttrium iron garnet film. The calculated interlayer dipolar coupling agrees with observed anticrossings [Chen et al., Phys. Rev. Lett. 120, 217202 (2018)PRLTAO0031-900710.1103/PhysRevLett.120.217202], concluding that the interlayer exchange coupling is suppressed by a spacer layer between the nanowires and film for Ni, but not necessarily for Co. The Kittel mode in the nanowire array couples chirally to spin waves in the film, even though Damon-Eshbach surface modes do not exist. The chirality can be suppressed by a strong interlayer exchange coupling.

Original languageEnglish
Article number134424
Number of pages12
JournalPhysical Review B
Volume99
Issue number13
DOIs
Publication statusPublished - 2019

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