Defect-property correlations in garnet crystals: The electrical conductivity and defect structure of luminescent cerium-doped yttrium aluminum garnet
- 15 March 1985
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 57 (6), 1951-1955
- https://doi.org/10.1063/1.334430
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.Keywords
This publication has 13 references indexed in Scilit:
- Electrical Conductivity of MgAl2O4 and Y3A15O12Journal of the American Ceramic Society, 1981
- Stress‐Induced Microcracking at Second‐Phase InclusionsJournal of the American Ceramic Society, 1981
- Investigation of competitive recombination processes in rare-earth activated garnet phosphorsPhysical Review B, 1979
- Electrical properties of yttrium iron garnet at high temperaturesPhysical Review B, 1976
- High-temperature electrical properties of yttrium iron garnet under varying oxygen pressuresSolid State Communications, 1974
- Electrical and optical properties of thin films of Pb2+- and Si4+-doped YIG produced by liquid phase epitaxyJournal of Applied Physics, 1974
- The stoichiometry and defect structure of yttrium iron garnet and the nature of the centres active in the photomagnetic effectJournal of Physics and Chemistry of Solids, 1973
- Electric and Dielectric Properties of Polycrystalline Yttrium Iron Garnet: Space-Charge-Limited Currents in an Inhomogeneous SolidPhysical Review B, 1973
- Non-ohmic currents in inhomogeneous polycrystalline yttrium iron garnetMaterials Research Bulletin, 1973
- Optical Absorption of from 10- to 55 000- Wave NumbersPhysical Review B, 1969