A structural study of liquid Te-rich Si-Te alloys

1st Conference on Light and Particle Beams in Materials Science 2013

物理学;材料科学

Kakinuma, Fujio^1 ; Hosokawa, Shinya^2 ; Ikemoto, Hiroyuki^3 ; Kohara, Shinji^4 ; Tsuchiya, Yoshimi^5

Department of Information and Electrical Engineering, Niigata Institute of Technology, 1719 Fujihashi, Kashiwazaki, 945-1195, Japan^1

Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto, Chuo-ku, 860-8555, Japan^2

Department of Physics, Faculty of Science, University of Toyama, 3190 Gofuku, Toyama, 930-8555, Japan^3

JASRI/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan^4

Department of Physics, Faculty of Science, Niigata University, 2-8050 Ikarashi, Nishi-ku, Niigata 950-2181, Japan^5

关键词: Constant temperature;    Coordination number;    Pair distribution functions;    Structural studies;    Temperature intervals;    Temperature variation;    Thermodynamic behaviour;    X-ray diffraction measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/502/1/012029/pdf
DOI  :  10.1088/1742-6596/502/1/012029

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

X-ray diffraction measurements using synchrotron radiation on liquid SixTe1-x (x≥0.2) were carried out at several temperatures. At constant temperature, the first peak, which is composed of Si-Te and Te-Te correlations, of the pair distribution function gradually shifts to the shorter distances with increasing Si content. These shifts indicate the substitution of Si-Te bond for the Te-Te bonds in the first peak. The total coordination number shows little temperature variation and remains about two in the temperature interval of a few hundreds of degrees. The composition and temperature behaviour of the Te-rich side of Si-Te liquid alloys has already been investigated, among which thermodynamic behaviour is a quite contrast to that of the Ge-Te alloys in the overlapping composition-temperature range of the present investigation. We clarify the evolution of the local structure of the liquid Si-Te alloys in comparison with the liquid Ge-Te alloys.