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Evidence for Instability in Pb1-x EuxTe Alloys

Published online by Cambridge University Press:  25 February 2011

L. Salamanca-Young ,
M. Wuttig ,
D. L. Partin  and
J. Heremans
L. Salamanca-Young
Affiliation:
Chemical and Nuclear Engineering Department, University of Maryland, College Park, MD 20742
M. Wuttig
Affiliation:
Chemical and Nuclear Engineering Department, University of Maryland, College Park, MD 20742
D. L. Partin
Affiliation:
General Motors Research Laboratories, Warren, MI 48090-9055
J. Heremans
Affiliation:
General Motors Research Laboratories, Warren, MI 48090-9055
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Abstract

We have used transmission electron microscopy to study the structure of Pb1-xEuxTe alloys grown by molecular beam epitaxy. We have observed ordered solid solutions of the Pb1-x EuxTe alloys as well as spinodal decomposition for 0.35≤x<0.75. The spinodal decomposition corresponds to a modulation of both the composition and the lattice spacing of the Pb1-x EuxTe alloy. These modulated structures have periodicities of ∼18Å along the <111> and <110> directions and indicate that the solid solution of Pb1-x Eux Te is unstable in this range of compositions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 103 , 1987 , 133
Copyright
Copyright © Materials Research Society 1988

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References

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