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Effects of lithium oxide on the electrical properties of CuO at low temperatures

Published online by Cambridge University Press:  31 January 2011

F. Lanza
Affiliation:
Commission of The European Communities, Joint Research Center, Institute for Advanced Materials, Ispra-21020, Italy
R. Feduzi
Affiliation:
Commission of The European Communities, Joint Research Center, Institute for Advanced Materials, Ispra-21020, Italy
J. Fuger
Affiliation:
Commission of The European Communities, Joint Research Center, Institute for Transuranium Elements, Karlsruhe 7500, Federal Republic of Germany
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Abstract

We present an investigation of the influence of four dopant lithium concentrations on the electrical properties of CuO. X-ray measurements have revealed a single phase formed up to 4.2 at. % of Li, and a second phase formed, Li2CuO2, in the case of 10.5 at. % of Li concentration. The log(ρ/T) vs 1/T data are better represented by two straight lines than by one and show an initial strong decrease of the conduction activation energies for small contents of Li (<1.7 at. %), which becomes weak for larger contents. The change in slope observed in the resistivity measurements as a function of temperature has also been investigated by calorimetric measurements, revealing a specific heat anomaly which can be associated with the antiferromagnetic order transition.

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Articles
Copyright
Copyright © Materials Research Society 1990

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