Defect property correlations in garnet crystals. II. Electrical conductivity and optical absorption in Ca3Al2Ge3O12
作者:
S. R. Rotman,
H. L. Tuller,
M. Roth,
A. Linz,
期刊:
Journal of Applied Physics
(AIP Available online 1985)
卷期:
Volume 57,
issue 12
页码: 5320-5324
ISSN:0021-8979
年代: 1985
DOI:10.1063/1.334848
出版商: AIP
数据来源: AIP
摘要:
Electrical conductivity and ionic transference measurements performed at varying temperatures and partial pressures of oxygen show that CALGAR (Ca3Al2Ge3O12), a luminescent garnet, is a mixed ionic‐electronic conductor. An activation energy of 1 eV for ionic diffusion is measured. An absorption band at 400 nm, whose magnitude can be controlled by varying the annealing atmosphere, is attributed to an O−center.
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