TRANSVERSE NERNST-ETTINGSHAUSEN EFFECT IN HGSE-FE,GA CRYSTALS CONTAINING MIXED-VALENCE IRON IMPURITIES

The transverse Nernst-Ettingshausen effect is investigated experimenta lly and theoretically for HgSe:Fe,Ga samples with various iron and gal lium impurity contents. It is shown that the unusual dependence of the magnitude and sign of the effect on the gallium impurity content are attributable to their influence on the degree of spatial ordering of t he trivalent iron ions and, accordingly, on the nature of the scatteri ng of conduction electrons. The results of the calculations agree qual itatively with the experimental data. (C) 1997 American Institute of P hysics.