Figure 1

(a) Definition of geometry. (b) Measurement circuit for the source-drain resistance $R(I,V_{\mathrm{G}\mathrm{C}},B_0)$. The two resistors $R_{\mathrm{s}\mathrm{y}\mathrm{m}}$ serve to symmetrize the circuit.Reuse & Permissions

Figure 2

(a) MEA of a BF245C JFET as a function of the channel current $I$. Solid lines are linear fits. (b) Channel resistance and MEA of a BF245C JFET as a function of the magnetic field $B_0$. Dashed line is a fit to a quadratic dependence. Solid line is a fit to a linear plus quadratic dependence. (c) Channel resistance and MEA of a BF245C JFET as a function of the gate-channel voltage $V_{\mathrm{G}\mathrm{C}}$. Lines are meant only to guide the eye.Reuse & Permissions

Figure 3

(a) Angular dependence of MEA of a BF245C JFET. Solid line is a fit to a $\cos \theta$ dependence. (b) Normalized MEA $\Delta R/RB$ as a function of quadratic magnetoresistance parameter $\beta$, obtained at temperatures in the range 77–293 K on a BF245C JFET. Solid line is a linear fit through the origin.Reuse & Permissions