Magnetoresistance of Semiconducting SrTiO3

Abstract

The magnetoresistance of reduced and doped SrTi${\mathrm{O}}_3$ was measured at 4.2°K in fields up to 8000 Oe. The effect was studied for directions of primary current and magnetic field along the major crystalline axes. Results are in agreement with the theoretical prediction of 3 (or 6) energy minima on the $〈100〉$ axes. Assuming an isotropic collision time, the effective-mass ratio is either 4.0 or 0.34.