The development of modern crioelectronic requires the creation of new the semiconductors materials, including materials, which to combine the superionic properties at low temperatures with other properties (optical, magnetic et al). In USU the five-component chalkogenides AgGePbS_3xSe_3(1-x) (x=0.3-0.7) were synthesised and their electrical properties by a method impedance spectroscopy are investigated. The compounds with x=0.4-0.7 have grey colour and metal shine, compound with x=0.3 have grey dim colour.
Godographs of an impedance are characterised by presence of two precisely divided areas - low-frequency (electrode processes) and high-frequency (processes in volume of a sample). Researches were carried out on frequency 1592Hz, which, as follows from the impedance diagrams, belongs to HF, in the field of temperatures 78K-400K. Temperature de-pendencies of conductivity the synthesised compounds have a Arrenius type, that is characteristic for ionic semiconductors.
For x=0.5 the conductivity at T=300K is equal 7.6 mS/m. The conductivity of compounds with x=0.4-0.7 on 1-2 order is less, than for compounds which containing As instead of Pb, is comparable to conductivity AgGeSbS₃ and on some orders less, than at AgGeSbSe₃. For x=0.3 the conductivity is comparable on size to conductivity AgGeSbSe₃. In compounds with x=0.7 at T~420K is observed piroelectric phase transition. All connections are the mixed ionic-electronic conductors with temperature of began the ionic of carry 220K-300K, the share ionic conductivity depends from x (50-99.5%).
It is possible, that other ratio of sulphur and selenium in compounds will result in the further growth of conductivity and downturn of temperatures of a beginning the ionic of carry. Also it will be interesting to investigate copper-containing chalkogenides.
The research was made possible in part by Award CRDF (No. REC-005).

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/828 must be provided.

1. Phase transition in five-component chalkogenides (PbSe)_x(AgAsSe₂)_1-x
2. Phase transitions in multicomponent chalkogenides of silver at high pressure by a method of impedance spectroscopy