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 first (high-frequency) regime the minimum detectable microwave power Pmin is limited by the low-frequency Johnson-Nyquist noise and the signal-to-noise ratio (SNR) of STMD is proportional to the input microwave power PRF. In the second (low-frequency) regime Pmin is limited by the magnetic noise, and the SNR is proportional to PRF. The developed formalism can be used for the optimization of the practical noise-handling parameters of a STMD.
@article{arxiv.1102.5048,
title = {Noise properties of a resonance-type spin-torque microwave detector},
author = {Oleksandr Prokopenko and Gennadiy Melkov and Elena Bankowski and Thomas Meitzler and Vasil Tiberkevich and Andrei Slavin},
journal= {arXiv preprint arXiv:1102.5048},
year = {2015}
}