Nuclear magnetic resonance and electrical conductivity in single-crystalline paratellurite

J. Wegener, O. Kanert, R. Kuchler, A. Watterich

Research output: Contribution to journalArticle

Abstract

l25Te nuclear spin relaxation (NSR) and electrical conducvitiy measurements were performed on single-crystalline paratellurite (a-Te02) between room temperature and the melting point (1007K) at various oxygen partial pressures. A defect model is developed which fits the experimental data. The model involves ionic oxgyen interstitials (Oj̏), doubly charged oxygen vacancies (v̏o) and charge-compensating electron holes (h*). The pressure dependence suggests that the NSR rate is induced by the motion of vowhile the conductivity is due to diffusion of h*. Further, the chemical diffusion coefficient is shown to be caused by ambipolar diffusion of Oj” and h*.

Original languageEnglish
Pages (from-to)277-281
Number of pages5
JournalRadiation Effects and Defects in Solids
Volume134
Issue number1-4
DOIs
Publication statusPublished - Dec 1 1995

Keywords

  • Oxides
  • conductivity
  • defects
  • diffusion
  • nuclear spin relaxation

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Condensed Matter Physics

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