On the nature of the thermally stimulated depolarization currents in MgO:Li

Two peaks at around 245 and 280 K are observed in the thermally stimulated depolarization (TSD) spectra of MgO:Li quenched in static air from temperatures above 1100 K. They are related to the ionization of [Li] 0 centers which are induced by this oxidizing quenching. The sample-thickness and applie...

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Bibliographic Details
Published in:Solid state communications 1994, Vol.90 (1), p.61-64
Main Authors: Vila, R., Ibarra, A., Jiménez de Castro, M., Mariani, D.F.
Format: Article
Language:English
Subjects:
Charge carriers: generation, recombination, lifetime, and trapping
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity phenomena in semiconductors and insulators
Electronic transport in condensed matter
Exact sciences and technology
Physics
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Summary:Two peaks at around 245 and 280 K are observed in the thermally stimulated depolarization (TSD) spectra of MgO:Li quenched in static air from temperatures above 1100 K. They are related to the ionization of [Li] 0 centers which are induced by this oxidizing quenching. The sample-thickness and applied-voltage dependences of the TSD results indicate, contrary to the previously proposed model based on Maxwell-Wagner polarization processes, that both peaks are due to the blocking character of the contracts at the sample-electrode interfaces.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(94)90963-6