Abstract Ternary phosphate glass doped with different terbium concentration (up to 35 wt.%) is synthesized via standard melt-quenching technique. The effect of terbium content on physical, optical, and magneto-optical properties is investigated. Two glass transition regions on DSC curve at 35 wt.% Tb2O3 demonstrate phase-separation process. Transmittance spectra demonstrate maximum 0.2 cm−1 level in optical transmittance window of 400–1600 nm limited by standard absorption bands for terbium-containing materials. Metaphosphate groups in as-synthesized glass structure are predominant over polyphosphate complexes with no ultraphosphate units regardless to composition changes. After the additional heat treatment the partial depolymerization of glass structure occurs resulting in formation of big amount of Q0 and Q1 units. Glass refractive index varies from 1.5872 to 1.5814 with terbium content increase. The concentration dependence of Verdet constant is non-linear due to the presence of Tb4+ ions, which was confirmed by the XPS analysis results. The value of 15 rad/T/m at 1064 nm is reached for 35 wt.% Tb2O3-doped glass. The results indicate the viability of the considered glass series with high terbium oxide concentration to be attractive media for magnetooptical devices working in VIS and near IR ranges.

中文翻译：

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铽浓度对三元磷酸盐玻璃磁光性能的影响

摘要 通过标准熔体淬火技术合成了掺杂不同铽浓度（高达 35 wt.%）的三元磷酸盐玻璃。研究了铽含量对物理、光学和磁光性能的影响。DSC 曲线上在 35 wt.% Tb2O3 下的两个玻璃化转变区域证明了相分离过程。透射光谱显示在 400-1600 nm 的光学透射窗口中最大 0.2 cm-1 水平受含铽材料的标准吸收带限制。无论组成如何变化，合成的玻璃结构中的偏磷酸盐基团都比没有超磷酸盐单元的多磷酸盐复合物占优势。额外热处理后，玻璃结构发生部分解聚，导致形成大量 Q0 和 Q1 单元。随着铽含量的增加，玻璃折射率从 1.5872 变化到 1.5814。由于存在 Tb4+ 离子，Verdet 常数的浓度依赖性是非线性的，XPS 分析结果证实了这一点。对于 35 wt.% Tb2O3 掺杂的玻璃，在 1064 nm 处达到 15 rad/T/m 的值。结果表明，所考虑的具有高氧化铽浓度的玻璃系列作为在可见光和近红外范围内工作的磁光器件的有吸引力的介质的可行性。