Magnetoresistance Symmetry Relation inn-Germanium

Careful measurement of the weak-field magnetoresistance coefficients of $n$-germanium indicates that the magnetoresistance symmetry relation is obeyed for samples with carrier concentrations as high as 6×${10}^{15}$ ${\mathrm{cm}}^{-3\mathrm{}}$. For a 3×${10}^{16}$ sample, the deviation, if any, is still quite small. For samples with carrier concentrations of 4×${10}^{17}$, 1×${10}^{18}$, and 1×${10}^{19}$, there is definite evidence of deviation but there is no evidence of the large deviations previously reported. The values of the anisotropy parameter $K$ obtained from these measurements are in agreement with values previously obtained from magnetoconductance measurements.