Noise properties of a resonance-type spin-torque microwave detector

作者：Prokopenko Oleksandr^*; Melkov Gennadiy; Bankowski Elena; Meitzler Thomas; Tiberkevich Vasil; Slavin Andrei

来源：Applied Physics Letters, 2011, 99(3): 032507.

DOI：10.1063/1.3612917

We analyze performance of a resonance-type spin-torque microwave detector (STMD) in the presence of noise and reveal two distinct regimes of STMD operation. In the high-frequency regime, the minimum detectable microwave power P(min) limited by the low-frequency Johnson-Nyquist noise and the signal-to-noise ratio (SNR) of STMD is proportional to the input microwave power P(RF). In the low-frequency regime, P(min) is limited by the magnetic noise, and the SNR is proportional to root P(RF). The developed formalism can be used for the optimization of the practical noise-handling parameters of a STMD.

• 出版日期2011-7-18