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This article is cited in 21 scientific papers (total in 21 papers)
Non-electronic properties of semiconductors (atomic structure, diffusion)
Polymorphic transformations and thermal expansion in AgCuSe$_{0.5}$(S,Te)$_{0.5}$ crystals
Yu. I. Aliyev, Yu. G. Asadov, R. D. Aliyeva, S. H. Jabarov Abdullaev Institute of Physics, National Academy of Sciences of Azerbaijan, Baku, Azerbaijan
Abstract:
The high-temperature X-ray diffraction technique is used to study AgCuSe$_{0.5}$(S,Te)$_{0.5}$ crystals. It is shown that, at room temperature, the AgCuSe$_{0.5}$S$_{0.5}$ crystal is composed of Cu$_{1.96}$S and AgCuSe phases. At a temperature of 695 K, these phases transform into a single face-centered cubic (fcc) phase. The transformation is reversible. The AgCuSe$_{0.5}$Te$_{0.5}$ composition consists of three phases, specifically, Cu$_{2}$Te, AgCuSe, and a cubic phase. At 444 K, both orthorhombic phases simultaneously transform into a diamond-like cubic phase. In this transformation, the cubic phase plays the role of a seed. From the temperature dependence of the lattice parameters, the thermal-expansion coefficients of the phases involved in both compositions are calculated for the main crystallographic directions.
Received: 10.03.2016 Accepted: 07.11.2016
Citation:
Yu. I. Aliyev, Yu. G. Asadov, R. D. Aliyeva, S. H. Jabarov, “Polymorphic transformations and thermal expansion in AgCuSe$_{0.5}$(S,Te)$_{0.5}$ crystals”, Fizika i Tekhnika Poluprovodnikov, 51:6 (2017), 766–772; Semiconductors, 51:6 (2017), 732–739
Linking options:
https://www.mathnet.ru/eng/phts6132 https://www.mathnet.ru/eng/phts/v51/i6/p766
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