Figure 3

Determination of SOT effective fields. (a) A schematic illustration of the Hall geometry used to measure higher order harmonic measurements. (b) R^ω vs α with a current of 6 mA and a field of 10 Oe. (c) R^2ω as a function of the magnetic field direction is measured with the same current and magnetic field. The red line is a fit using Eq. 1. (d) The current dependence of SOTs effective field value, extracted from the fitting of (c). A small offset due to the slight misalignment of the Hall bar is subtracted from the data.