Structure and Surface Morphology of Cd1–xMnxSe Epitaxial Films

Resumo

Cd_1–xMn_xSe (х = 0.03) epitaxial films are produced by the molecular beam condensation method in a vacuum chamber with a residual pressure of 10^–4 Pa on mica and glass substrates. It is established that at room temperature and at a substrate temperature of T = 573 K films of polycrystalline structure grow on the mica substrates, but films of both polycrystalline and amorphous structure grow on the glass substrates. It is shown that the polycrystalline Cd_1–xMn_xSe (х = 0.03) films, unlike the bulk crystals, have a sphalerite-type structure with a lattice parameter of a = 6.05 Å. Increasing the substrate temperature to 673 K leads to epitaxial growth with the direction [111]. Dark aggregates, observed on the film surface, are removed using a source of compensating Se vapors during the growth process. The optimal conditions for the production of structurally perfect epitaxial films are defined.