[18p-PB1-1~73] 10 スピントロニクス・マグネティクス（ポスター）

▼ [18p-PB1-66] Magnetization dynamics at high S₂₁ condition in magnetic tunnel junction

〇Yuma Yamada¹、Minori Goto^1,4、Takekazu Yamane²、Naomichi Degawa²、Tuyoshi Suzuki²、Atsushi Shimura²、Susumu Aoki²、Junichiro Urabe²、Atsushi Ajioka²、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：MTJ, RF amplifier, spintronics

Various radio-frequency(RF) devices, using a Magnetic tunnel junction (MTJ), have been developed including spin-torque oscillator and spin-torque diode. In addition to these devices, MTJ can be used as amplifier of RF signals. The amplification is excited by ferromagnetic resonance (FMR) with a direct current applying to MTJ. Recently, it is reported that the RF transport signal (S₁₁) from MTJ could be amplified by RF external magnetic field.In this study, we demonstrate the high S₂₁ value using MTJ and its physical mechanism.