Correlation between the trap state spectra and dielectric behavior of CaCu3Ti4O12

The temperature dependence of the various electric relaxation times in the perovskite oxide CaCu3Ti4O12 (CCTO) is determined (i) by trap state spectroscopy and (ii) by the dielectric loss function. A similarity in both number and properties of the (i) and (ii) relaxation times was found, suggesting...

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Published in:Journal of materials research 2011-01, Vol.26 (1), p.36-44
Main Authors: Bärner, K., Luo, X.J., Song, X.P., Hang, C., Chen, S.S., Medvedeva, I.V., Yang, C.P.
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Language:English
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Applied and Technical Physics
Biomaterials
Inorganic Chemistry
Materials Engineering
Materials Science
Nanotechnology
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description The temperature dependence of the various electric relaxation times in the perovskite oxide CaCu3Ti4O12 (CCTO) is determined (i) by trap state spectroscopy and (ii) by the dielectric loss function. A similarity in both number and properties of the (i) and (ii) relaxation times was found, suggesting that the dielectric response is strongly correlated with the trap state relaxation, although some differences remain. One or more dipoles developing charged trap states are considered responsible, and the experimental dielectric response of CCTO and Mn substituted CCTO are explored.
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subjects Applied and Technical Physics
Biomaterials
Inorganic Chemistry
Materials Engineering
Materials Science
Nanotechnology
title Correlation between the trap state spectra and dielectric behavior of CaCu3Ti4O12
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