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

Abstract

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 $P_{\min }$ 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 $P_{\mathrm{RF}}$. In the second (low-frequency) regime $P_{\min }$ is limited by the magnetic noise, and the SNR is proportional to $\sqrt{P_{\mathrm{RF}}}$. The developed formalism can be used for the optimization of the practical noise-handling parameters of a STMD.

3 pages, 2 figures

References in corpus (1)

• Stochastic resonance of a nanomagnet excited by spin transfer torque

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