Abstract
The Fe3O4 nanoparticles, incorporated into two diamagnetic glasses (TeO2–PbO–B2O3 and PbO–Bi2O3–B2O3) by DC magnetron sputtering, were annealed at 300°C for 22h in order to investigate the influence to the thermal stability and magneto-optical properties of glasses. The structure, morphology and magnetic properties of two sputtered glasses were compared and characterized using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and UV–VIS spectra measurements. The Verdet constant of glasses was measured by a home-made optical bench.Sputtered samples (Fe3O4 target) were compared with the one obtained by melt-quenching Fe3O4 nanoparticles. The influence of sputtered Fe3O4 layer thickness on thermal and magneto-optical performance was investigated. The results prove that the magnetic property of both glasses, and especially the TeO2–PbO–B2O3 one, is enhanced after the incorporation of 1–5μm-thick-Fe3O4 layer deposited by sputtering. Compared with the uncoated glasses, no significant degradation in FT-IR transmittance, UV–VIS absorption and thermal stability were discovered. The TeO2–PbO–B2O3–Fe3O4 system exhibits the best thermal and magneto-optical performances for magneto optical applications, within the two glass families.
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