[18a-D704-1~11] 10.2 Fundamental and exploratory device technologies for spin

▲ [18a-D704-1] Theoretical investigation of cavity magnomechanics with a synthetic antiferromagnet

〇Motoki Asano¹, Hiroki Matsumoto², Masamitsu Hayashi², Daiki Hatanaka¹ (1.NTT BRL, 2.The Univ. of Tokyo)

Keywords:Cavity magnomechanics, Synthetic antiferromagnet, Magnetostrictive coupling

Creating novel phononic and spintronic functionalities is expected by controlling interaction between phonons in an acoustic resonator and spin precessions (i.e., magnons) in a ferromagnet. Although magnetoelastic coupling via magnetostriction has been extensively studied for single-layer ferromagnetic films, the coupling dynamics of the interaction between multilayer ferromagnetic films with hybridized magnon modes and resonator phonons remains largely unexplored. We theoretically analyzed the spin precession of a two-layer ferromagnetic film antiferromagnetically coupled to surface acoustic waves and clarified its coupling dynamics.