Highly nonreciprocal spin waves excited by magnetoelastic coupling in a ni / si bilayer

Shoma Tateno, Yukio Nozaki, Yukio Nozaki

Research output: Contribution to journalArticle

Abstract

We demonstrate a largely enhanced nonreciprocal propagation of spin waves (SWs) magnetoelastically excited in Ni/Si bilayer films. The nonreciprocity is attributed to the shear component of the strain tensor, which can be enlarged by increasing the thickness of the Si layer. By evaporating a 400-nm-thick Si layer on a Ni film, we enhanced the nonreciprocal ratio by up to 1200%. This finding paves the way for rectification of SWs in magnonic devices.

Original languageEnglish
Article number034074
JournalPhysical Review Applied
Volume13
Issue number1
DOIs
Publication statusPublished - 2020 Mar

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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