Anomalous dielectric relaxation in reduced LiNbO3 single crystals

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Reduced black LiNbO3 single crystals were prepared by heat treatment at 1000 degrees C for 3h in H-2-N-2 atmosphere. The dependence of their dielectric properties on frequency and temperature was investigated from 1kHz to 100kHz in the temperature range 400 degrees C < T < 800 degrees C. A dielectric anomaly was found within 500 degrees C < T < 680 degrees C. The position of the maximum dielectric constant depends on heating rates in air. At a constant heating rate, intensity of dielectric constant depends on the frequency but its position does not change. The anomalous dielectric relaxation resulted from the oxygen vacancies in reduced LiNbO3.
Publisher
JAPAN J APPLIED PHYSICS
Issue Date
1997
Language
English
Article Type
Article
Keywords

LITHIUM-NIOBATE; DEFECT STRUCTURE

Citation

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES &amp; REVIEW PAPERS, v.36, no.9A, pp.5555 - 5557

ISSN
0021-4922
DOI
10.1143/JJAP.36.5555
URI
http://hdl.handle.net/10203/69515
Appears in Collection
MS-Journal Papers(저널논문)
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