Inorganic Materials

, Volume 37, Issue 4, pp 342–348

Composition and Properties of Layered Compounds in the GeTe–Sb2Te3System

  • L. E. Shelimova
  • O. G. Karpinskii
  • P. P. Konstantinov
  • M. A. Kretova
  • E. S. Avilov
  • V. S. Zemskov
Article

Abstract

The 620-K section of the Ge–Sb–Te phase diagram was mapped out using x-ray diffraction, microstructural analysis, and microhardness measurements. The transport properties of the layered tetradymite-like compounds nGeTe · mSb2Te3(n, m= 1–4) were studied in wide temperature ranges (Hall effect and electrical resistivity, from 77 to 800 K, and thermoelectric power, from 90 to 450 K). The results show that the nGeTe · mSb2Te3compounds are degeneratep-type semiconductors with a fairly high hole concentration due to the high density of intrinsic point defects. The temperature dependences of the Hall coefficient and resistivity exhibit anomalies related to solid-state phase transitions. The room-temperature lattice thermal conductivity ofnGeTe · mSb2Te3is fairly low, in the range 8–10 mW/(cm K).

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Copyright information

© MAIK “Nauka/Interperiodica” 2001

Authors and Affiliations

  • L. E. Shelimova
    • 1
  • O. G. Karpinskii
    • 1
  • P. P. Konstantinov
    • 2
  • M. A. Kretova
    • 1
  • E. S. Avilov
    • 1
  • V. S. Zemskov
    • 1
  1. 1.Baikov Institute of Metallurgy and Materials ResearchRussian Academy of SciencesMoscowRussia
  2. 2.Ioffe Physicotechnical InstituteRussian Academy of SciencesSt. PetersburgRussia

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