Abstract
The Raman spectra of thin (d = 60–170 nm) Ge-Se polycrystalline films obtained by vacuum thermal evaporation of Ge10Se90 glass are investigated in the spectral range 110–310 cm−1. The coexistence of the glasslike and crystalline phases α-Se, β-Se, and β-GeSe2 is established using the X-ray diffraction method. Analysis of diffraction patterns and the Raman spectra of polycrystalline samples of various thicknesses demonstrates a phase size effect in the transition of Se from the α-monoclinic to the β monoclinic modification (d ∼ 120 nm). It is found that the crystalline phase of Se is of the nanodisperse type with an average grain size of ∼30–50 nm. Crystallites of β-GeSe2 have an average size of ∼100–130 nm.
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Original Russian Text © E.V. Aleksandrovich, E.V. Stepanova, A.V. Vakhrouchev, A.N. Aleksandrovich, D.L. Bulatov, 2013, published in Zhurnal Tekhnicheskoi Fiziki, 2013, Vol. 83, No. 9, pp. 50–55.
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Aleksandrovich, E.V., Stepanova, E.V., Vakhrouchev, A.V. et al. Phase size effect in thin Ge-Se polycrystalline films. Tech. Phys. 58, 1291–1296 (2013). https://doi.org/10.1134/S106378421309003X
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DOI: https://doi.org/10.1134/S106378421309003X