Transport and Magnetic Properties of Ag8Ge1—xMnxTe6 Solid Solutions

Abstract

The solubility regions of \({\text{A}}{{{\text{g}}}_{8}}{\text{G}}{{{\text{e}}}_{{1 - x}}}{\text{M}}{{{\text{n}}}_{x}}{\text{T}}{{{\text{e}}}_{6}}\) solid solutions were determined by structural analysis. The nature of sample conductivity was revealed by studying kinetic parameters in the range of 100–600 K. The samples are p-type and have high resistance below the temperature range of 180–220 K. The electrical conductivity in the range of 220–300 K increases according to the Mott rule, and at T > 320 K a semiconductor behavior is observed in samples of all compositions. In the temperature range of 80–750 K, the features of the field dependences of the specific magnetization σ_m = f(B), as well as the susceptibility of the \({\text{A}}{{{\text{g}}}_{8}}{\text{G}}{{{\text{e}}}_{{1 - x}}}{\text{M}}{{{\text{n}}}_{x}}{\text{T}}{{{\text{e}}}_{6}}\) composition, were studied. The temperature of the magnetic phase transformation “magnetic order–magnetic disorder” of the composition \({\text{A}}{{{\text{g}}}_{8}}{\text{G}}{{{\text{e}}}_{{1 - x}}}{\text{M}}{{{\text{n}}}_{x}}{\text{T}}{{{\text{e}}}_{6}}\) was determined.