Preparation and magnetic properties of TbF3 containing oxide fluoride glasses

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 kg m−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 5.13 K emu mol−1; its effective magnetic susceptibility is 9.96μB. 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.