Figure 1: Sample structure.
From: Nanowire spin torque oscillator driven by spin orbit torques
(a) Schematic of a Pt/Py nanowire STO device: external magnetic field is shown as a black arrow, precessing Py magnetization is shown as a red arrow, green arrows indicate the flow of direct electric current applied to the nanowire, microwave voltage generated by the sample is depicted as a wave with an arrow. (b) Scanning electron micrograph of the Pt/Py nanowire STO. The Pt/Py nanowire is the grey strip in the lower part of the image. The bright areas on both sides of the image are Au/Cr leads. Scale bar, 1 μm. The inset shows resistance versus in-plane magnetic field applied perpendicular to the nanowire measured at the bath temperature Tb=4.2 K and a bias current of 0.5 mA. The black arrow shows the magnetic field sweep direction.
