Spinodal decomposition and clustering in III/V alloys |
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Authors: | G B Stringfellow |
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Affiliation: | (1) University of Utah, 84112 Salt Lake City, Utah |
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Abstract: | The criteria for clustering and spinodal decomposition in III/V pseudobinary and quaternary solid alloys are examined. A chemical
driving force for clustering and phase separation exists in some ternary and most quaternary alloys. However, single crystalline
alloys are shown to be stabilized by the coherency strain energy inherent in any clustering or spinodal decomposition in alloys
where lattice parameter is a function of composition. Analytical expressions are derived for Ts, the temperature above which no clustering or phase separation should occur. Most III/V pseudobinary and quaternary alloys
are stable at all temperatures. Numerical techniques are used to calculate spinodal isotherms. Results are presented for the
systems GaxIn1−x As P1−y, A1xGa1−xAsySb1−y, and GaxIn1−x As P1−y.
This work was supported by the Department of Energy, contract No. DE-AT 03-81 ER 10934. |
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Keywords: | Phase Diagrams Quaternary III/V Alloys Spinodal Decomposition |
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