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Dielectric Properties of the Solid Solution Formed in the System LiTao3 - “Li2MnO4 ”

Published online by Cambridge University Press:  25 February 2011

M.E. Villafuerte-Castrejón ,
J.L. Pineda  and
A. Huanosta
M.E. Villafuerte-Castrejón
Affiliation:
Instituto de Investigaciones en MaterialesUniversidad Nacional Autónoma de México. Apdo Postal 70-360. México D.F. 04510., México
J.L. Pineda
Affiliation:
Instituto de Investigaciones en MaterialesUniversidad Nacional Autónoma de México. Apdo Postal 70-360. México D.F. 04510., México
A. Huanosta
Affiliation:
Instituto de Investigaciones en MaterialesUniversidad Nacional Autónoma de México. Apdo Postal 70-360. México D.F. 04510., México
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Abstract

Impedance spectroscopy methods were used to characterize the electrical properties of the solid solution formed in the system LiTaO3 -“Li2Mn4O9”.

Involved parameters were calculated using equialent circuits. Activation energy values were decreasing from around 1.3 eV for lowest concentration of Mn4+ until around 0.8 eV for higher Mn4+ contents. Results will be discused in terms of Z' vs Z" and Arrhenius plots. The ferroelectric character was stablished using the real part of the permittivity against temperature. Curie temperature values Tc were found decreasing toward higher concentration of Mn4+ in the range 630-580°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 293: Symposium U – Solid State Ionics III , 1992 , 423
Copyright
Copyright © Materials Research Society 1993

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