Abstract
Glass-forming regions of ternary Ge-Te-Cu and Ge-Te-In chalcogenide glasses are examined by differential scanning calorimeter and by X-ray diffraction. Glass transition and crystallization temperatures are about 120 °C To 260 °C, respectively higher than those of binary Ge-Te glass [T. Katsuyama and M. Matsumura, “Infrared Optical Fibres” (Adam Hilger, London, 1989) p. 212]. Only a small range of compositions after quenching the melting alloy is characterized by disordered state, but this range of composition is widened when using a vapor deposition technique. These compositions have two glass transition temperatures, showing the existence of phases in the sample. Both the Kissinger equation and modified Kissinger kinetic analysis were adopted to estimate activation energy and the reaction order of the process. Ge-Te-Cu and Ge-Te-In crystallized in two stages, nucleation and crystal growth. These two processes can be distinguished by exothermal crystallization patterns. An atomic radial distribution analysis has been made on bulk Ge1Te4In x and Ge1Te4Cu x with x = 0.1 by X-ray diffraction techniques. The radial distribution function (RDF) is discussed in terms of the structure factor F(s). Thin films of Ge-Te-Cu and Ge-Te-In are deposited on silicate glass and silicon wafer substrates by vacuum evaporation. The optical energy E opt are determined from transmission and reflection data of a deposited films. The value of E opt decreased by increasing metal additive such as Cu or In and discussed as a function of the conditions of their preparation such as substrate type.
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References
T. Katsuyama and H. Matsumura, “Infrared Optical Fibers” (Adam Hilger, London, 1989) p. 212.
Idem., Appl. Phys. Lett. 49 (1986) 22.
T. Takamori, R. Roy and G. J. McCarthy, Mater. Res. Bull. 5 (1970) 529.
S. Lizima, M. Sugi, M. Kikuchi and K. Tanaka, Solid State Commun. 8 (1970) 153.
J. A. Savaga, J. Mater. Sci. 6 (1971) 964.
Idem. J. Non-Crystalline Solids 11 (1972) 121.
S. Bordas, J. Casas-Vazquez, N. Clavaguera and M. T. Clavaguera-Mora, Thermochim. Acta 28 (1973) 387.
R. A. Ligero, M. Casas-Ruiz, J. Vazquez and P. Villares, J. of Mater. Sci. 27 (1992) 1001.
A. E. Owen, in “Electronic and Structural Properties of Amorphous Semi.-Conductor” edited by P. G. Lecomber and J. Mort (Academic, London 1973).
J. Tauk, in “Amorphous and Liquid Semi.-Conductor” edited by J. Touc (Plenum Press, New York, 1974) chap. 4.
R. A. Ligero, Ph.D. thesis, University of Cadiz, Spain, 1988.
J. S. Berkes, in Non-Crystalline Solids, 4th International Conference, 1977, p. 405.
S. Tolansky, “Multiple Beam Interferometry of Surfaces and Films” (Oxford University Press London) 1947, p. 147.
S. Asokan, G. Parthasarathy and E. S. R. Gopol, J. Non-Crystalline Solids 86 (1986) 48.
S. Mohadevan, A. Giridhar and A. K. Singh, ibid. 88 (1986) 11.
Kissinger, Anal. Chem. 29 (1957) 1702.
N. Rysava, T. Spasov and L. Tichy, J. Therm-Anal. 32 (1987) 1015.
H. Yinnon and D. R. Uhlmann, J. Non-Crystalline Solids 54 (1983) 253.
A. Marotta, S. Saiello and Buri, ibid. 57 (1983) 473.
E. Kissinger, J. of Research of National Bureau of Standards 57(4) (1956) 217.
F. Demichellis, G. Kaniaakis, A. Tagliaferrd and E. Tresso, Appl. Optics 26 (1987) 1737.
J. Tauc, R. Grigorovici and A. Vancu. Phys. Stat. Sol. 15 (1966) 627.
E. A. Davis and N. F. Mott, Phil. Mag. 22 (1970) 903.
S. R. Ovshinsky, in “Physical Properties of Amorphous Materials” edited by D. Adler, B. B. Schwartz and M. C. Steel, Institute for Amorphous Studies Series Vol. 1 (Plenum, New York, 1985), Chapt. 2.
B. E. Warren, “X-Ray Diffraction” (Addision-Wesley, Reading MA, 1969).
Norikazu Ohshima, J. Appl. Phys. 79 (1996) 11.
K. Furukawa, B. R. Orton, J. Hamor and G. I. Williaks, Phil. Mag. 8 (1963) 141.
D. Hernderson and F. Herman. J. Non-Crystalline Solids 8/10 (1972) 359.
A. Chevy, A. Kuhn and M. S. Martin, J. Cryst. Growth 38 (1977) 118.
S. R. Ovchinsky and D. Adler, Contemp. Phys. 19 (1978) 109.
J. Bicerano and S. R. Ovshinsky J. Non-Crystalline Solids 74 (1972) 75.
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Fayek, S.A., El Sayed, S.M., El-Sayed et al. Glass formation, optical properties and local atomic arrangement of chalcogenide systems GeTe-Cu and GeTe-In. Journal of Materials Science 36, 2061–2066 (2001). https://doi.org/10.1023/A:1017595202649
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DOI: https://doi.org/10.1023/A:1017595202649