Fig. 4: Noise power spectrum measurement.
From: Uncooled sub-GHz spin bolometer driven by auto-oscillation
a Schematic of measurement circuit used for noise power spectrum. b Color mapping of bias-voltage dependence of noise power spectrum. The resolution bandwidth is 5 MHz. c Noise power spectra in the bias-voltage range of −280 to −299 mV. In both (b) and (c), dashed yellow and red lines represent the peak frequency due to magnoise and spin-torque auto-oscillation, respectively. These are drawn in free hand as a guide for the eye.
