Galvanomagnetic Effects ofn−InSbbelow 1°K

Some galvanomagnetic properties of $n-\mathrm{I}\mathrm{n}\mathrm{S}\mathrm{b}$ have been measured in the temperature range 4-0.4°K with donor concentrations between 2.6×${10}^{15}$ and 7.5×${10}^{13}$ ${\mathrm{cm}}^{-3\mathrm{}}$. The electrical conductivity in zero magnetic field indicated the lack of freeze-out for all donor concentrations measured. The transverse magneto-resistance of samples with donor concentrations of 7.5×${10}^{13}$ and 1.0×${10}^{14}$ ${\mathrm{cm}}^{-3\mathrm{}}$ showed a saturation in magnetic fields less than 10 kOe, provided that the temperature was less than 1°K. At temperatures above 1°K, the saturation was not observed in any of the samples in magnetic fields up to 16 kOe. A possible interpretation of the saturation effect is given by assuming a hydrogen-molecule model of the impurities and by taking the dominant scattering mechanism to be due to neutral impurities.