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Structure and Transport Properties of Sr0.75-xCaxY0.25Co0.25Mn0.75O3-δ (0 ≤ x ≤ 0.6)

Published online by Cambridge University Press:  01 February 2011

Alexandra Galeeva ,
Philipp Napolsky ,
Sergey Istomin ,
Andrey Gippius  and
Dmitry Khokhlov
Alexandra Galeeva
Affiliation:
galeeva_alex@mail.ru
Philipp Napolsky
Affiliation:
napolsky@icr.chem.msu.ru, Lomonosov MSU, Moscow, Russian Federation
Sergey Istomin
Affiliation:
istomin@icr.chem.msu.ru, Lomonosov MSU, Moscow, Russian Federation
Andrey Gippius
Affiliation:
gippius@phys.msu.ru, Lomonosov MSU, Moscow, Russian Federation
Dmitry Khokhlov
Affiliation:
khokhlov@mig.phys.msu.ru, Lomonosov MSU, Moscow, Russian Federation
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Abstract

New complex oxide Sr0.75-xCaxY0.25Co0.25Mn0.75O3-δ with a perovskite-like structure has been synthesized and characterized. DC and AC transport properties of ceramic samples have been studied in the temperature range 4.2K – 1173K. DC conductivity data at T > 300K are discussed in terms of the small polaron hopping model. Dependence of the polaron activation energy on the calcium content is found to correlate with the change of structural distortion parameters. Both the temperature dependence of DC conductivity and the frequency dependence of the real part of the admittance reveal hopping transport at low temperatures.

Keywords

electrical propertiestransportationceramic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1256: Symposium N – Functional Oxide Nanostructures and Heterostructures , 2010 , 1256-N06-31
Copyright
Copyright © Materials Research Society 2010

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