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Abstract: The preparation of the rare earth containing oxide fluoride glasses LnF3 (Ln; Y through Lu)–BaF2–AlF3–GeO2 in which the nominal content of LnF3 reached 60mol% in maximum and their basic properties such as density, refractive index and glass transition temperature were investigated and summarized in detail. Especially, in order to discuss the local structure around the rare earth ion in the glass, the Judd–Ofelt analysis (discussion with Ω parameters) of the HoF3–BaF2–AlF3–GeO2 glasses was carried out. The unique fluorescent behavior and the magnetic properties of LnF3–BaF2–AlF3–GeO2 glasses (Ln=Tb and/or Sm) were also studied. [Copyright &y& Elsevier]

Abstract: New oxide fluoride glasses containing HoF3 was successfully prepared in the glass system of HoF3–BaF2–AlF3–GeO2 in which the maximum content of HoF3 reached approximately 50mol% as the nominal composition. Glass transition temperatures, densities and refractive indices of the prepared glasses with various HoF3 contents were 572.3–614.4°C, 4.45–6.45×103 kgm−3 and 1.58–1.68, respectively. Absorption and the fluorescence spectra were measured for the glasses with HoF3 contents of 10–50mol%. The profiles of the absorption and the fluorescence spectra were influenced by the content of HoF3. Especially, the intensity ratio of the fluorescence spectra at 550 and 660nm changed drastically with the contents of HoF3 in the glasses. The experimental results were analyzed in the frame of the Judd–Ofelt theory. [Copyright &y& Elsevier]

Abstract: New glasses containing TbF3 have been prepared in a TbF3–BaF2–AlF3–GeO2 system. Their respective densities, refractive indexes, and glass transition temperatures are (5.42–6.07)×103 kgm−3, 1.72–1.73, and 605.1–675.2°C. Their magnetic susceptibilities are proportional to the contents of TbF3 in glasses obtained in this study. The values agree with the calculated values. The Curie constant of the 40TbF3–20BaF2–10AlF3–20GeO2 glass is 5.13Kemumol−1; its effective magnetic susceptibility is 9.96μ B. The atomic percentage of Tb3+ in the 40TbF3–20BaF2–10AlF3–20GeO2 glass is 11%, which is comparable to that of the oxide glass, which is reported as the material for Faraday components. [Copyright &y& Elsevier]