Abstract

The ion substitution characteristics of Y<sup>3+</sup>-doped (Tb<sub>0.8</sub>Y<sub>0.2</sub>)<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> 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<sup>-1</sup>·m<sup>-1</sup>. 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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