Abstract
In this study, pure Y2O3, La0.1Y1.9O3 and La0.1Nd0.12Y1.78O3 nanosized powders were successfully synthesized by a modified sol–gel method. Pure and rare-earth ions doped yttria powders were characterized by X-ray diffraction, scanning electron microscopy and Brunauer–Emmett–Teller methods. The powders were sintered by the hot isostatic pressing process. The highest in-line transmittance of 56% was obtained at 800 nm and increased in the IR region. The influence of the lanthanum and neodymium ions on the physicochemical properties of yttria were discussed. The La-Nd-doped material exhibited a Verdet constant over 4000 deg/T·m at 400 nm and low thermal dependence. An interesting evolution of the Verdet constant across the absorption band with high resolution was studied. A study of the optical and magneto-optical properties of yttria doped with Nd3+ and La3+ is discussed in this paper.
Highlights
In recent years, extensive efforts have been made to develop transparent materials based on the cubic oxides RE2 O3 (RE = Y, Sc, Lu or Gd) due to the strong demand for applications, such as solid-state laser materials [1], sight windows [2], scintillators [3], nuclear medicine [4], X-ray computed tomography [5], security [6], astrophysics [7] and particle physics [8]
Due to its high dielectric constant, yttria may be used in devices for the semiconductor components of metal oxide semiconductors (MOSs) [10] and flat-panel display applications such as light-emitting diode (LED), field-emission display (FED) and photodiode (PD) transistors [11]
Results of the Verdet constant for the Y2 O3, La0.1 Y1.9 O3 and La0.1 Nd0.12 Y1.78 O3 transparent ceramics as a function of the wavelength and temperature are shown in Figures 11 and 12
Summary
The effect of La and Nd ions on the structural and the magneto-optical and properties of nanocrystalline Y2 O3 sinters were investigated by X-ray diffraction, scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy and temperature-dependent magneto-optical spectroscopy. These results contain valuable data concerning the magneto-optical properties of La and La, Nd-Y2 O3 translucent ceramics presenting an evolution of the Verdet constant across the absorption band with a high resolution. A detailed correlation between structures, microstructural and magneto-optical characterization and their property evaluation will be presented and discussed
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