Figure 2

Magnetic features of the Ta-based sample [Sample A] under a DC source for two measurement schemes. (a) Hall resistance R_H versus H_ext parallel to the positive (red line) and negative (blue line) current I_dc with a magnitude of 0.5 mA. (b,c) Separated anomalous Hall effect signal (R_AHE) and planar Hall effect signal (R_PHE) from the R_H as a function of H_ext parallel to zero-current (black line), +0.5 mA (red line) and −0.5 mA (blue line). (d) Hall resistance R_H verse H_ext perpendicular to the positive (red line) and negative (blue line) current I_dc with a magnitude of 0.5 mA. Similarly, (e,f) R_AHE and R_PHE versus H_ext perpendicular to zero-current (black line), +0.5 mA (red line) and −0.5 mA (blue line). Insets: the magnified features of the graphs reflect the obvious difference in the main curves recorded at ±I_dc current, which lowered the magnetization in one direction and increased it in the other direction.