Back to Search Start Over

A New Zinc Phosphate-Tellurite Glass for Magneto-Optical Applications

Authors :
Mihail Elisa
Raluca Constantina Stefan
Ileana Cristina Vasiliu
Stefan Marian Iordache
Ana-Maria Iordache
Bogdan Alexandru Sava
Lucica Boroica
Marius Catalin Dinca
Ana Violeta Filip
Aurelian Catalin Galca
Cristina Bartha
Nicusor Iacob
Madalin Ion Rusu
Mihai Eftimie
Victor Kuncser
Source :
Nanomaterials, Vol 10, Iss 9, p 1875 (2020)
Publication Year :
2020
Publisher :
MDPI AG, 2020.

Abstract

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–stirring–quenching–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.

Details

Language :
English
ISSN :
20794991 and 00869422
Volume :
10
Issue :
9
Database :
Directory of Open Access Journals
Journal :
Nanomaterials
Publication Type :
Academic Journal
Accession number :
edsdoj.6ac37db008694223a5ae9df24ce4eae9
Document Type :
article
Full Text :
https://doi.org/10.3390/nano10091875