Figure 3

(a) Drain-source resistance R_DS as a function of the in-plane external magnetic field μ₀H applied along the [\(\bar{1}\)10] direction at 3.8 K. Here, the drain-source voltage V_DS was −5 mV and the gate-source voltage V_GS was 0 V. The black circles correspond to the major loop and the red circles correspond to the minor loop. The black (red) arrows are the sweep directions in the major (minor) loop. The magnetization states in the major loop are indicated by the white arrows above the graph. (b) TMR ratio as a function of the gate-source voltage V_GS at 3.8 K. Here, the drain-source voltage V_DS was fixed at −5 mV and the external magnetic field H was applied along the [\(\bar{1}\)10] direction. The TMR ratio is the maximum value obtained in the major loop at each V_GS. (c–e) Magnetic-field-direction dependences of the TMR ratios at V_DS = −10 mV with V_GS = 0 V (c), -5 V (d) and −10 V (e).