Fig. 3: Second harmonic measurement and BMER signal of the Pt3Sn sample.

a Illustration of the second harmonic measurement and XY(θ), YZ(ψ), and XZ(β) scans. b Observed second harmonic voltage of XY scan. c Field dependence of second harmonic voltage shows the voltage is proportional to the applied field (black) and applied current (blue). d Second harmonic voltage for XY, YZ, and XZ scans, e Illustration of the absence of the z-direction signal in YZ and XZ scan. Crystallites in different directions contribute to z-direction signals which cancel with each other and result in a flat line in YZ scan.