Abstract
The influence of incorporation of Fe2O3 on the physical, structural, optical, and electrical properties of zinc- samarium- phosphate glasses synthesized via conventional melt quenching technique have been studied. The polycrystalline nature, crystallinity percentage, and average size of the developed nanocrystallites in the prepared sample have been determined from the obtained X-ray diffraction data. Density and molar volume data show inverse relation, which has been explained by the formation of Non-bridging oxygens. The optical bandgap energy (Eopt) values, obtained from spectroscopic data, and the calculated Urbach energy values (EU) has an inverse relationship varying with Fe2O3 concentration (x). The Fe2O3 concentration (x) dependent refractive index, electronic polarizability, molar refraction, oxide ion polarizability, optical basicity, and electronegativity have been determined. Mott's variable range hopping model is used to explain the DC conduction mechanism of the glass nanocomposites system, while the non-overlapping small polaron tunneling model has been used to explain the AC conduction mechanism. Both the AC and DC conductivity are found to increase with the incorporation of Fe2O3. The scaling property of AC conductivity reveals that the conductivity relaxation process depends on the structural composition of the present sample but is independent of temperature.
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