A study of temperature dependent epsilon"(omega) in amorphous LiNbO3 and KNbO3: Mode coupling theory analysis

Authors
Hwang, YH Kim, SH Kim, J Kim, S Oh, J Jang, MS
Citation
Yh. Hwang et al., A study of temperature dependent epsilon"(omega) in amorphous LiNbO3 and KNbO3: Mode coupling theory analysis, J KOR PHYS, 35, 1999, pp. S1354-S1358
Citations number
21
Categorie Soggetti
Physics
Journal title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
ISSN journal
03744884 → ACNP
Volume
35
Year of publication
1999
Supplement
S
Pages
S1354 - S1358
Database
ISI
SICI code
0374-4884(199912)35:<S1354:ASOTDE>2.0.ZU;2-C
Abstract
We analysed the imaginary part of frequency dependent dielectric constant e psilon"(omega) of amorphous ferroelectrics, LiNbO3 and KNbO3, at temperatur es below the crystallization using the Mode coupling theory (MCT). We found that ion transportation behavior in amorphous ferroelectrics can be explai ned well by the MCT cu relaxation predictions. We observed the cu relaxatio n scaling in epsilon"(omega). As a result of which the alpha relaxation str etched exponent beta(DC) was temperature independent with beta(DC) similar or equal to 0.6 for both LiNbO3 and KNbO3.