The 83rd JSAP Autumn Meeting 2022

Presentation information

Oral presentation

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

[22p-A205-1~18] 10.2 Fundamental and exploratory device technologies for spin

Thu. Sep 22, 2022 1:30 PM - 6:30 PM A205 (A205)

Shun Kanai(Tohoku Univ.), Kenji Kasahara(Fukuoka Univ.), Itoh Keita(東北大)

5:30 PM - 5:45 PM

[22p-A205-15] Time resolved state tomography for time evolution of parametric oscillation of magnetization

Hiroki Shimizu1, Tomosato Hioki2,1, Eiji Saitoh1,2 (1.Dept. Appl. Phys. Univ. Tokyo, 2.AIMR Tohoku Univ.)

Keywords:magnetization dynamics, parametric excitation

In this study, we extended the state tomography method for magnetization using AC spin current measurements to a time-resolved measurement system with high-speed signal processing techniques. We report the observation of the time-resolved magnetization dynamics in a magnetic parametron consisting of thin disk of yttrium iron garnet (YIG). We also report the observation of a magnon thermal squeezed state in which the thermal distribution of the magnetization is squeezed in one direction due to nonlinear effects of the parametric excitation.