Abstract

The ion substitution characteristics of Y³⁺-doped (Tb_0.8Y_0.2)₃Al₅O₁₂ transparent ceramics synthesized by a solid-state reaction and vacuum sintering are investigated. The sample sintered at 1 680 °C exhibits the best optical properties, yielding a transmittance >75% from 900 to 1 600 nm. The Verdet constant of this sample at 632.8 nm is -108.79 rad·T^-1·m^-1. X-ray diffraction (XRD) results show that all of the samples have a pure garnet crystal structure without secondary phases. The microstructure of the samples reveals homogeneous grain sizes that averages <10 μm.

© 2013 Chinese Optics Letters

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