Features of the Conductivity of the Ag8Ge1-xMnxTe6 Solid Solutions ()
ABSTRACT
Samples of Ag8Ge1-xMnxTe6 solid solutions with different manganese content (x = 0, 0.05, 0.1, 0.2) were prepared by fusing and further
pressing their powders
under the pressure of 0.6 GPa. In addition of Mn atoms to the Ag8GeTe6 compound leads to compression of their lattice. All p-type samples
acquire a high resistance below the transition at temperatures of 180 - 220 K.
The electrical conductivity of all compositions in the range of 220 - 300 K increases
due to hopping mechanism, and at temperatures T > 320 K, a semiconductor
characteristic is observed. By studying impedance spectra of samples, it was
established that at 80 K solid solutions
behave like a homogeneous dielectric material. At high temperatures and
frequencies of an external electric field, a significant role of grain
boundaries in conductivity was revealed. The dielectric anomaly occurring at
low frequencies is also associated with an effect that manifests itself in the
grain boundary.
Share and Cite:
Rahimov, R. , Gahramanova, A. , Arasly, D. , Halilova, A. and Mammadov, I. (2022) Features of the Conductivity of the Ag
8Ge
1-xMn
xTe
6 Solid Solutions.
Journal of Materials Science and Chemical Engineering,
10, 16-28. doi:
10.4236/msce.2022.105002.