Abstract
Sn13Se87-xSbx (x = 0, 3, 6, 9, 12) glassy system is synthesized by melt quench technique. This glassy system has been studied for various physical parameters viz. coordination number, lone pair of electrons, number of constraints, bond energy, heat of atomization, glass transition temperature, cohesive energy, band gap and mean bond energy. From the physical analysis it is generalized that the average number of constraints, average heat of atomization, mean bond energy, glass transition temperature and cohesive energy are found to increase whereas numbers of lone pair of electrons calculated are found to decrease with the increase in the antimony content in the composition of the alloy. The increase in glass transition temperature has been explicated on the basis of accumulation of antimony atoms in selenium chain.
Highlights
In the present electronic era chalcogenide glasses have attracted the attention of various researchers due to their potential applications in active as well as passive solid state electronics and optical devices
The physical parameters viz. coordination number, number of constraints, number of lone pair electrons, bond energies of the different bonds formed in the system, heat of atomization, cohesive energy, mean bond energy, glass transition temperature are theoretically studied for the Sn-Se-Sb glassy system
Calculation of coordination number (m) and number of constraints in glassy network the coordination number in Sn13Se87-xSbx (x = 0, 3, 6, 9, 12) glassy system increases with increase in Sb content
Summary
In the present electronic era chalcogenide glasses have attracted the attention of various researchers due to their potential applications in active as well as passive solid state electronics and optical devices. Modern chalcogenide glasses are extensively used in rewritable optical disks and phase change memory devices Since they are fragile glass formers, by applying heat they can be switched between an amorphous and a crystalline state. Each impurity may satisfy its valence requirements by adjusting with its nearest neighbor’s environment This fact leads to a belief that properties of amorphous semiconductors are weakly affected by the addition of impurities but recently it has been reported that the addition of metal impurities may increases the refractive index and lowers the optical band gap significantly [16]. The addition of Sb to the Sn-Se system may be likely to change its optical and electric properties significantly This brace us to study the Sn13Se87-xSbx (x = 0, 3, 6, 9, 12) glassy system. The physical parameters viz. coordination number, number of constraints, number of lone pair electrons, bond energies of the different bonds formed in the system, heat of atomization, cohesive energy, mean bond energy, glass transition temperature are theoretically studied for the Sn-Se-Sb glassy system
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