Fig. 1: Magnetoresistance measurement.
From: Negative spin Hall magnetoresistance of normal metal/ferromagnet bilayers
a Schematic illustration of the Hall-bar device for magnetoresistance (MR) measurement and definition of the magnetic field angle β in the yz plane. The longitudinal and transverse resistanances (Rxx, Rxy) are measured using a DC current (IDC) of 100 μA. b SEM image of the Hall bar. c–e β-angle dependence of the MR [\(\Delta R_{xx} = (R_{xx}(\beta ) - R_{xx}(\beta = 0)){\mathrm{/}}R_{xx}(\beta = 0)\)] in Ta/NiFe sample (c), Pt/NiFe sample (d), and NiFe single-layer sample (e). Results in c–e are intentionally offset for clarity. f–h Ferromagnet-thickness (tF) dependence of MR ratio (ΔrMR) of Ta/NiFe sample (f), Pt/NiFe sample (g), and NiFe single-layer sample (h). Red squares in h show the normalized anomalous Hall resistance (=Rxy/Rxx) of NiFe single-layer sample. The error bars in f–h are from the statistical variation of the SMR.
