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Ion Dynamics Study of Nb(+5)-Substituted La(2)Mo(2)O(9) by AC Impedance Spectroscopy

IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata

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Title Ion Dynamics Study of Nb(+5)-Substituted La(2)Mo(2)O(9) by AC Impedance Spectroscopy
 
Creator Basu, S
Maiti, Himadri Sekhar
 
Subject Engineering Materials
Crystal Chemistry, Thermodynamics, Phase Equilibria
 
Description To identify the ionic conductivity mechanism of Nb(+5)-substituted La(2)Mo(2)O(9), an ion dynamic study on these substituted materials has been performed. Although the ionic conductivity and mechanism of conduction has already been reported, the ion dynamic study of these materials has scarcely been carried out to establish the conduction mechanism. The frequency dependence of ac conductivity of Nb(+5)-doped La(2)Mo(2)O(9) has been explained by means of frequency dispersion of conductivity as well as in terms of modulus formalism. The values of the exponential parameter s of the universal dielectric response and the stretching exponent beta of the Kohlrausch-Williams-Watts relation are evaluated from curve fitting. Temperature dependence of such parameters is checked and is interpreted for the plausible mechanism of ionic motion in the material at low temperature. The scaling behavior of these materials are also studied to evaluate the composition and temperature dependence of the conduction mechanism.
 
Publisher The Electrochemical Society
 
Date 2009
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://cgcri.csircentral.net/560/1/J_Electrochem_Soc_156_%282009%29_P114-P116.pdf
Basu, S and Maiti, Himadri Sekhar (2009) Ion Dynamics Study of Nb(+5)-Substituted La(2)Mo(2)O(9) by AC Impedance Spectroscopy. Journal of the Electrochemical Society, 156 (7). pp. 114-116. ISSN 0013-4651
 
Relation http://cgcri.csircentral.net/560/