New magnetic glass compositions, based on system (100-x) (60GeO₂ -25B₂O₃ –4Al₂O₃ -10Na₂O–1PbO) – xTb₄O₇ were prepared by the melt-quenching technique. The materials were systematically characterized with respect to their structural (XRD, EXAFS, XANES and Raman), thermal (DSC), morphological, optical, magnetic and magneto-optical (MO) properties. Morphological and magnetic measurements show the homogeneous distribution of the Tb³⁺ ions as the magnetic susceptibility increases proportionally to the rare earth content. The optical window covers the range from 0.5 up to 1.6 μm, limited by absorption due to 4f⁸ -> 4f⁷ 5 d ¹and 4f⁸ -> 4f⁸ transitions of Tb³⁺. XANES and EXAFS measurements at the Ge–K edge show that the germanium atoms are always tetrahedrally coordinated, while results at the Tb-L_III edge shows terbium atoms to be eight-coordinated and exclusively present in the oxidation state 3+ independently of the glass composition. MO measurements show that the Verdet constant (V_B) increases linearly with the Tb³⁺ concentration reaching the value of −83.9 rad T⁻¹m⁻¹ at 650 nm for glass containing 8 mol% of Tb₄O_7. Good thermal stability (ΔT = 200 °C) allowed obtaining an optical fiber of a glass containing 4 mol% of Tb₄O₇ featuring V_B values of −37.9, −23.6 and −5.89 rad T⁻¹ m⁻¹, at 500, 650 and 1550 nm, respectively.

通过熔融淬火技术制备了基于体系（100- x）（60GeO ₂ -25B ₂ O ₃ -4Al ₂ O ₃ -10Na ₂ O-1PbO）-x Tb ₄ O _7的新型磁性玻璃组合物。根据材料的结构（XRD，EXAFS，XANES和拉曼），热（DSC），形态，光学，磁性和磁光（MO）特性对材料进行了系统表征。形态和磁学测量表明Tb ³⁺的均匀分布离子的磁化率与稀土含量成正比。由于Tb ^3+的4f ^8- > 4f ⁷ 5 d ¹和4f ^8- > 4f ⁸跃迁，光窗口覆盖了从0.5到1.6μm的范围，受吸收限制。在Ge–K边缘的XANES和EXAFS测量表明，锗原子始终是四面体配位的，而在Tb-L _III边缘的结果表明，atoms原子是8配位的，并且仅以3+的氧化态存在，与玻璃无关组成。MO测量表明，Verdet常数（V _B）随着Tb ³⁺线性增加 含有8摩尔％Tb ₄ O _7的玻璃在650 nm处的浓度达到-83.9 rad T ^-1 m ^-1的值_。良好的热稳定性（ΔT= 200°C）使得能够获得含有4摩尔Tb的玻璃的光纤。在300、650和1550 nm处分别具有−37.9，-23.6和−5.89 rad T ^-1  m ^-1的V _B值的Tb ₄ O _7的百分比。