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The Effect of Composition Dependent Lattice Strain on the Chemical Potential of Tellurium in Pb1−xSnxSe1−yTey Quaternary Alloys

Published online by Cambridge University Press:  21 February 2011

Patrick J. Mccann
Patrick J. Mccann*
Affiliation:
School of Electrical Engineering, University of Oklahoma, Norman, OK 73019
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Abstract

IV-VI semiconductor Pb1−xsSnxsSe1−ysTeys quaternary alloys were grown on (111) BaF2 by liquid phase epitaxy (LPE). X-ray diffraction analysis shows that liquid (Pb1−x1Snx1)0.99(Se1−y1Tey1)0.01 solutions produce alloys lattice-matched with the substrate wheny1 = 60%, 58%, and 57%, and x1 = 20%, 40%, and 60%, respectively. These data suggest that the chemical potential of tellurium in the Pb1−xsSnxsSe1−ysTeys solid solution decreases as tin and tellurium concentrations increase. It is argued that this reduction is due to decreasing strain energy driven segregation of tellurium from the solid to the liquid as the tin concentration increases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 311: Symposium O – Phase Transformations in Thin Films–Thermodynamics and Kinetics , 1993 , 149
Copyright
Copyright © Materials Research Society 1993

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References

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