2023 International Conference on Solid State Devices and Materials
Sep 5 - Oct 31, 2023Nagoya Congress Center
2023 International Conference on Solid State Devices and Materials
Sep 5 - Oct 31, 2023Nagoya Congress Center
[B-3-03]High Frequency Spin Torque Oscillation in Orthogonal Magnetization Disks with Strong Biquadratic Magnetic Coupling
○Chuhan Liu1, Yuichiro Kurokawa1, Naoki Hashimoto1, Terumitsu Tanaka1, Hiromi Yuasa1(1. Kyushu University (Japan))
We investigate the spin transfer torque oscillation (STO) in a magnetic orthogonal configuration with a strong biquadratic magnetic coupling to obtain a high and stable STO in both of simulations and experiments. The sample structure consists of a bottom layer with perpendicular magnetic anisotropy (PMA), a spacer providing a biquadratic magnetic coupling, and a top layer with in-plane magnetic anisotropy. The bottom PMA layer is the Co/Pt lamination, the spacer is Cr, and the top layer is Co90Fe10. The spacer Cr is expected to have a large biquadratic magnetic coupling coefficient B12 because the B12 of Co90Fe10/Cr/Co90Fe10 was estimated as -0.6 from the magnetization curves.