Magnetic freeze-out effects in n-type indium antimonide

Measurements of the longitudinal and transverse magnetoresistance and Hall coefficient of indium antimonide in the magnetic freeze-out range are described. For magnetic fields greater than 5 kG, the longitudinal magnetoresistance can be readily interpreted, assuming conduction is only due to electrons remaining in the conduction band. This is considered to be more plausible than the interpretation of the Hall coefficient used by previous authors, in which it is assumed that a two-band model can be used up to quite high fields. On the basis of conduction by a single band, values of the donor ionization energy as a function of magnetic field are calculated, with no adjustable parameters, and compared with the theory of Yafet, Keyes, and Adams.