Affiliation:
1. Sultan Qaboos University
2. El-Neelain University
Abstract
The variations of dc conductivities (σ) of the Sr2-xLixFeMnO6 double perovskite system over a
range of temperatures (100 ~ 300 K) and for several concentrations (0≤ x ≤ 0.4) of incorporated Li+ ions
are well described by the equation σ = (B/T) exp(−Ea/kT) and show a decrease with decreasing
temperature for a given doping. At a given temperature, σ tends to decrease with increasing x. The derived
activation energy shows a gradual increase with x with a range of values that are lower than what is
usually reported. The measured ac impedance is used to extract the relaxation frequencies as a function of
composition and temperature.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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