ABSTRACT
Using the four probe van der Pauw technique the galvanomagnetic effects of the compounds A2SnSe3 and Ag2SnTe3 have been investigated. The resistivity, Hall coefficient, mobility and magnetoresistance were measured as a function of temperature. The optical absorption was measured near the fundamental edge. The results indicate that n-type Ag2SnSe3 follows a behaviour semiconductor-like meanwhile Ag2SnTe3 shows a behaviour which seems to be metallic or with a mixture of semiconductor and metallic-like zones. The mobility of Ag2SnSe3 is well accounted for by the activated mobility model of Cutler and Mott. It can be concluded as found for the CU2IV-V3 family that Ag2SnSe3 compound seems to give semiconductor-like materials more easily than Ag2SnSe3 compounds.
