Defect-property correlations in garnet crystals: The electrical conductivity and defect structure of luminescent cerium-doped yttrium aluminum garnet

S. R. Rotman, R. P. Tandon, H. L. Tuller

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

The conduction mechanisms in cerium-doped yttrium aluminum garnet (Ce:YAG) have been studied as a function of temperature and PO2. ac conductivity and ionic transference measurements show that Ce:YAG is a mixed ionic-electronic conductor with an ionic conductivity characterized by an activation energy of 2.3 eV. A derived thermal band-gap energy of 6.1 eV compares favorably with the optically measured band gap. Conductivity and transference measurements support a defect model with a fixed number of doubly-ionized oxygen vacancies as the primary defect; the energy to produce such vacancies is calculated to be 7.8 eV.

Original languageEnglish
Pages (from-to)1951-1955
Number of pages5
JournalJournal of Applied Physics
Volume57
Issue number6
DOIs
StatePublished - 1 Dec 1985
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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