Fig. 2: Spin-torque diode spectrum.
From: Uncooled sub-GHz spin bolometer driven by auto-oscillation
a Schematic of a magnetic tunnel junction and a coordinate system with azimuthal angle θ and rotation angle φ. The red and black arrows represent the free and pinned layer magnetizations, respectively. b Frequency dependence of diode voltage under magnetic field B = 50 mT, θ = 11°, and φ = 45° at a dc bias current Idc = −2.6 mA. Input microwave power P is −55 dBm. c Color mapping of diode voltages under magnetic field intensities of 44–60 mT, azimuthal angles of 6°–12°, and rotation angles of 20°–60°.
