The 70th JSAP Spring Meeting 2023

Presentation information

Oral presentation

10 Spintronics and Magnetics » 10.2 Fundamental and exploratory device technologies for spin

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

Sat. Mar 18, 2023 9:00 AM - 12:00 PM D704 (Building No. 11)

Minori Goto(Osaka Univ.), Shinji Isogami(NIMS)

10:30 AM - 10:45 AM

[18a-D704-6] [The 53rd Young Scientist Presentation Award Speech] The origin of the acoustic spin Hall effect

Takuya Kawada1, Hiroki Matsumoto1, Masashi Kawaguchi1, Hiroshi Kohno2, Masamitsu Hayashi1 (1.The Univ. of Tokyo, 2.Nagoya Univ.)

Keywords:surface acoustic wave, spin current, spin orbit interaction

We demonstrated that SAW induces AC spin current in a heavy metal (HM) via spin-orbit interaction (acoustic spin Hall effect). The microscopic mechanism of the SAW-induced AC spin current, however, remained uncovered. In this work, we aim to identify the underlying mechanism of SAW-induced AC spin current. The acoustic voltages are measured for SAW devices with different SAW propagation orientation with respect to the electric polarization of a ferroelectric substrate. We also model the electromagnetic responses of a metallic thin film to an AC electric field coupled with SAW at the surface of the ferroelectric substrate. Obtained results indicate that the SAW-induced AC spin current is generated from the SAW-induced AC electric field via the spin Hall effect.