[26a-E201-1~12] 10.2 Fundamental and exploratory device technologies for spin

[26a-E201-2] A magnomechanical device based on a phononic crystal cavity and waveguide

〇Daiki Hatanaka¹, Motoki Asano¹, Hajime Okamoto¹, Hiroshi Yamaguchi¹ (1.NTT-BRL)

Keywords:magnomechanics, phonon, magnon

we report a novel magnomechanical device based on a wavelength-scale phononic crystal (PnC) cavity and its magnomechanical characterization at room temperature. The resonant vibrations of the cavity, excited through a waveguide, drive spin precessions in a nickel thin-film via magnetostriction. This also exets back-action on the dynamics of the PnC cavity, resulting in the resonant frequency and quality factor being modulated. To the best of our knowledge, this is a first demonstration of the magnomechanical hybrid device formed in a wavelength-scale PnC cavity.