This study aims to investigate correlations between lattice effects and transport properties in cubic La2Mo2O9. High temperature neutron diffraction data, recorded in air and under vacuum, are used to follow the evolution with temperature of selected structural parameters, i.e. bond lengths and angles. Results suggest a possible correlation with the experimentally observed decrease of the activation energy for oxygen migration at high temperature. The effect on the structural properties of the low oxygen partial pressure used during the measurements in vacuum is negligible and this represents a valuable information in view of possible applications of the material in solid state devices. r 2008 Elsevier Inc. All rights reserved.
Lattice effects in cubicLa2Mo2O9: effect of vacuum and correlation with transport properties
COSTA, GIORGIO
2008-01-01
Abstract
This study aims to investigate correlations between lattice effects and transport properties in cubic La2Mo2O9. High temperature neutron diffraction data, recorded in air and under vacuum, are used to follow the evolution with temperature of selected structural parameters, i.e. bond lengths and angles. Results suggest a possible correlation with the experimentally observed decrease of the activation energy for oxygen migration at high temperature. The effect on the structural properties of the low oxygen partial pressure used during the measurements in vacuum is negligible and this represents a valuable information in view of possible applications of the material in solid state devices. r 2008 Elsevier Inc. All rights reserved.
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