The type of current carriers in defective manganese sulfide and with cationic substitution by samarium ions

Abstract

Abstract IR spectra and electrical resistance of defective manganese sulfide with the substitution of manganese ions with samarium ions in the of 80-500 K are investigated. The maxima of the temperature coefficient of electrical resistance and anomalies of conductivity are attributed to spin and lattice polarons. Absorption bands have been found in the IR spectra, that due to oscillations of octahedra and lattice polarons. From the Hall measurements, the type of current carriers, concentration and mobility of hole and electrons are estimated.