[11p-M101-15~21] 10.3 Spin devices, magnetic memories and storages

▼ [11p-M101-16] Microwave emission from magnoise in heat-driven magnetic tunnel junction
with feedback loop circuit

〇(M1)Yuma Yamada¹, Minori Goto^1,4, Takekazu Yamane², Naomichi Degawa², Tsuyoshi Suzuki², Atsushi Shimura², Susumu Aoki², Junichiro Urabe², Shinji Hara², Shinji Miwa^1,3,4, Yoshishige Suzuki^1,4 (1.Osaka Univ., 2.TDK, 3.Univ. of Tokyo., 4.CSRN-Osaka)

Keywords:Magnetic tunnel junction, Radio frequency, Amplifier

Magnetic tunnel junction (MTJ) is attracting attention as the next generation microwave signal sources. Recently, it was reported that the microwave reflectivity (S₁₁) from MTJ is amplified by spin-torque from heat-induced magnetic anisotropy change [1]. In addition, we reported that the transmission signal (S₂₁) is amplified with a similar mechanism [2]. In this study, we investigate the microwave emission from magnoise in MTJ, and characterize transmission amplification by the heat-induced torque with feedback loop circuit.
[1] M. Goto et al., Nat. Nanotechnol. (2019). [2] Y. Yamada et al., JSAP Autumn meeting (2018)