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

Journal article (2019)

Authors

T. Yu Kavli institute of nanoscience Delft, QN/Bauer Group - AS
Chuanpu Liu Beihang University
Haiming Yu Beihang University
Y.M. Blanter QN/Blanter Group - AS , Kavli institute of nanoscience Delft
G.E. Bauer Tohoku University, QN/Bauer Group - AS , Kavli institute of nanoscience Delft
Research Group
QN/Bauer Group (AS) (TU Delft)
Copyright: © 2019 T. Yu, Chuanpu Liu, Haiming Yu, Y.M. Blanter, G.E. Bauer
DOI: https://doi.org/10.1103/PhysRevB.99.134424
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Published Date

2019

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Bauer Group

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.

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