[11p-M101-15~21] 10.3 スピンデバイス・磁気メモリ・ストレージ技術

▼ [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)

キーワード：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)