Resumo

DIAZ ALBARRAN, S.F.  e  ELYUKHIN, V.A.. Spinodal decomposition ranges of Al_XGa_1-XN_yP_1-y and Al_XGa_1-XN_ySb_1-y alloys. Rev. mex. fis. [online]. 2005, vol.51, n.6, pp.605-609. ISSN 0035-001X.

Spinodal decomposition ranges of low N-content Al_XGa_1-XN_yP_1-y and Al_XGa_1-XN_ySb_1-y alloys grown on GaP (001) and GaSb (001) substrates, respectively, are described. The alloys are considered according to the strictly regular approximation. In the analysis we take into account the transformations of the bonds and strain, coherency strain, and elastic energies. The spinodal decomposition ranges of the alloys with compositions 0 ≤ x ≤ 0.4, 0 ≤ y ≤ 0.05 are demonstrated up to temperatures of 1100 °C. It is shown that the enlargement of Al and N concentrations dramatically increases the phase separation temperature.

Palavras-chave : III-V quaternary alloys; Spinodal decomposition.

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