Ion-channeling studies of the structural phase transition in (GaSb${)}_{1\mathrm{-}\mathrm{x}}$(${\mathrm{Ge}}_2$${)}_{\mathrm{x}}$ alloys

Ion channeling (of ${}_{}{}^4{}_{}{}^{}\mathrm{He}_{}^{+}{}_{}{}^{}$ at 1.0 MeV) has been used to investigate the long-range order in thin-film metastable (GaSb${)}_{1\mathrm{-}\mathrm{x}}$(${\mathrm{Ge}}_2$ ${)}_{\mathrm{x}}$ alloys as a function of x. Spectra were obtained at a set of incident beam orientations along an angular scan through the [110] direction and parallel to the (11¯0) plane. The asymmetry in the Sb yield was used to follow the phase transformation from the zinc blende structure to the diamond structure.