A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications
| Autor: | Nicusor Iacob, Raluca Constantina Stefan, Lucica Boroica, M. I. Rusu, Mihai Eftimie, Aurelian Catalin Galca, Ana-Maria Iordache, Ana Violeta Filip, Mihail Elisa, Marius Catalin Dinca, Stefan Marian Iordache, I.C. Vasiliu, Bogdan Alexandru Sava, Cristina Bartha, Victor Kuncser |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Band gap General Chemical Engineering Analytical chemistry diluted ferromagnetism optical spectroscopies magneto-optical functionalities 02 engineering and technology 01 natural sciences Article magneto-optical functionalities Nanoclusters lcsh:Chemistry symbols.namesake Condensed Matter::Materials Science Phase (matter) 0103 physical sciences General Materials Science Physics::Chemical Physics glass optical spectroscopies 010302 applied physics diluted ferromagnetism Reflection loss 021001 nanoscience & nanotechnology Ferromagnetism lcsh:QD1-999 symbols Diamagnetism 0210 nano-technology Raman spectroscopy Refractive index |
| Zdroj: | Nanomaterials Volume 10 Issue 9 Nanomaterials, Vol 10, Iss 1875, p 1875 (2020) |
| ISSN: | 2079-4991 |
| Popis: | This work investigates the structural, magnetic and magneto-optical properties of a new zinc phosphate-tellurite glass belonging to the 45ZnO-10Al2O3-40P2O5-5TeO2 system. The glass was prepared by a wet method of processing the starting reagents followed by suitable melting&ndash stirring&ndash quenching&ndash annealing steps. Specific parameters such as density, average molecular mass, molar volume, oxygen packaging density, refractive index, molar refractivity, electronic polarizability, reflection loss, optical transmission, band gap and optical basicity have been reported together with thermal, magnetic and magneto-optical characteristics. Absorption bands appear in the blue and red visible region, while over 600 nm the glass becomes more transparent. FTIR and Raman spectra evidenced phosphate-tellurite vibration modes proving the P2O5 and TeO2 network forming role. Magnetic measurements reveal the diamagnetic character of the Te-doped glass with an additional weak ferromagnetic signal, specific to diluted ferromagnetic oxides. Positive Faraday rotation angle with monotonous decreasing value at increasing wavelength was evidenced from magneto-optical measurements. The final product is a composite material comprising of a non-crystalline vitreous phase and Te-based nanoclusters accompanied by oxygen vacancies. The metallic-like Te colloids are responsible for the dark reddish color of the glass whereas the accompanying oxygen vacancies might be responsible for the weak ferromagnetic signal persisting up to room temperature. |
| Databáze: | OpenAIRE |
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