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Stolbov, A. A.; Lyapin, A. G.; Popova, S. V.; Brazhkin, V. V.; Gromnitskaya, E. L.; Stal'GOROVA, O. V.
High pressure research, 03/2003, Letnik: 23, Številka: 1-2Journal Article
We present the systematic study of the elastic shear G and bulk B moduli in amorphous and crystalline metastable ternary solid solutions (GaSb) 1−x Ge 2x . It is found that the moduli of crystalline phases initially decrease with Ge concentration, falling down to minimum values at 20-30% Ge. The minimal values of elastic moduli for amorphous samples are observed at 50-60% Ge. Elastic softness of crystalline solid solutions is assumed to be related to the increase of chemical disorder and, consequently, of static (non-thermal) geometrical disorder in positions of atoms. An additional topological disorder in amorphous solid solutions leads to additional elastic softening.
