Study of As-Sb-Se chalcogenide glasses by NQR and EPR spectroscopy methods
نویسندگان
چکیده
In this paper experimental results obtained by both 75As NQR and EPR spectroscopy are presented for the three-component system As-Sb-Se. The 75As NQR spectra of glasses of structures (As2Se3)0.78(Sb2Se3)0.22, (As2Se3)0,75(Sb2Se3)0.25, (As2Se3)0.5(Sb2Se3)0.5 have broad lines with two Sb-NQR lines (corresponding to the Sb2Se3 units) and two 75As-NQR lines (corresponding to the As2Se3 units). Differences in the EPR spectra of the different glasses arise because of the different amounts of arsenic and antimony in their structure. PACS (2008): 76.60.Gv, 76.30.-v
منابع مشابه
Microstructure, mechanical and thermal properties of chalcogenide glasses and glass-ceramics based on Se-As-Ge system nucleated by Sn
In particular, chalcogenide glasses and glass-ceramics are new materials that exhibit good transparency in infrared region (0.8-12µm). We can overcome the main weakness of these glasses by improving the hardness through controlling crystallization. In this paper, we report results of a study on chalcogenide glasses in the ternary system of As-Se-Ge with nominal composition of Snx (Se...
متن کاملFabrication and Structural Characterization of Se-Ge Chalcogenide Glasses by Means of Melt Quenching Technique
The structural and optical characterization of Se-Ge alloys during melt quenching technique was the goal of this study. In this regards, five different samples of Se100-xGex (x= 10, 20, 30, 40, 50) were prepared by conventional melt quenching in quartz ampoule. The produced samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calori...
متن کاملCompositional dependence of the nonlinear refractive index of new germanium-based chalcogenide glasses
In this paper, we report results of n2 measurements of new chalcogenide glasses in the Ge–Sb–S–Se system using a modified Z-Scan technique. Measurements were made with picosecond pulses emitted by a 10Hz Q-switched mode-locked Nd-YAG laser at 1064nm under conditions suitable to characterize ultrafast nonlinearities. The nonlinear index increases up to 500 times the n2 of fused silica with an in...
متن کاملFabrication and Investigation of Se-Ge Glass-Ceramics in the Presence of Ga and Sn Additives
The Chalcogenide glasses were fabricated by melting and quenching techniques in the Se-Ge system at the presence of 1mol% Ga and 3, 5, and 7mol% Sn. Differential Scanning Calorimetry (DSC) analysis was conducted to extract the heat treatment of the samples. Fourier Transform Infrared (FTIR) spectroscopy analysis was also performed in a range of 2-16µm. The Glass samples were heat-treated at 450...
متن کاملCrystallization Kinetics of Chalcogenide Glasses
Chalcogenide glasses are disordered non crystalline materials which have pronounced tendency their atoms to link together to form link chain. Chalcogenide glasses can be obtained by mixing the chalcogen elements, viz, S, Se and Te with elements of the periodic table such as Ga, In, Si, Ge, Sn, As, Sb and Bi, Ag, Cd, Zn etc. In these glasses, short-range inter-atomic forces are predominantly cov...
متن کامل