Investigation on the Growth and Properties of Six Garnet Single Crystals with Large Lattice Constants

IF 1.5 4区材料科学 Q3 CRYSTALLOGRAPHY

Crystal Research and Technology Pub Date : 2021-03-22 DOI:10.1002/crat.202000221

Zhiyuan Han, D. Sun, Huili Zhang, Jianqiao Luo, Cong Quan, Lunzhen Hu, Kunpeng Dong, M. Cheng, Guangzhu Chen, Y. Hang

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引用次数: 12

Abstract

Large lattice constant Y3Al5O12, Gd3Ga5O12 (GGG), Y3Sc2Ga3O12 (YSGG), Gd3Sc2Ga3O12, Ca0.4Mg0.25Zr0.65Gd2.6Ga4.1O12 (CaMgZr:GGG), and Gd1.17Y1.83Sc2Ga3O12 (GYSGG) substrate crystals with 2 in. in diameter are grown by the Czochralski (Cz) method, their physical, chemical, and optical properties are analyzed and compared in details. The X‐ray rocking curves (XRCs) illustrate that the as‐grown crystals possess high crystalline quality. The lattice constants of six crystals are calculated and that of GYSGG can be easily adjusted in the range of 1.2450–1.2565 nm by changing the Gd/Y proportion. The dislocation densities on the (111)‐crystalline face are about 102 cm−2 order of magnitude. The thermal conductivities of six crystals are measured to be 11.72, 8.98, 6.83, 5.45, 4.67, and 4.66 W m−1 K−1, respectively. It is found that the thermal expansion coefficients of six crystals can be reduced by annealing at 1273 K for 60 h. In addition, the transmission spectra show that the six crystals have excellent transparency and the coefficients of the Sellmeier equation are fitted by the calculated refractive indices. These results of the six crystals can provide the necessary parameters and references for the selection of suitable substrate materials or laser host crystals.

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六种大晶格常数石榴石单晶的生长与性能研究

大晶格常数Y3Al5O12, Gd3Ga5O12 (GGG)， Y3Sc2Ga3O12 (YSGG)， Gd3Sc2Ga3O12, ca0.4 mg0.25 zr0.65 gd2.6 ga4.1012 (CaMgZr:GGG)和Gd1.17Y1.83Sc2Ga3O12 (GYSGG)底物晶体具有2 in。采用Cz法生长了直径约为10微米的三聚体，并对其物理、化学和光学性质进行了详细的分析和比较。X射线摇摆曲线(xrc)表明，该晶体具有较高的结晶质量。计算了6个晶体的晶格常数，通过改变Gd/Y比例，可以在1.2450 ~ 1.2565 nm范围内轻松调节GYSGG的晶格常数。(111)‐晶面上的位错密度约为102 cm−2数量级。测得六种晶体的导热系数分别为11.72、8.98、6.83、5.45、4.67和4.66 W m−1 K−1。在1273 K下退火60 h可以降低6个晶体的热膨胀系数，透射光谱表明6个晶体具有良好的透明度，且计算出的折射率与Sellmeier方程的系数相拟合。这些结果可以为选择合适的衬底材料或激光主晶体提供必要的参数和参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Crystal Research and Technology 化学-晶体学

自引率

6.70%

发文量

121

审稿时长

1.9 months

期刊介绍： The journal Crystal Research and Technology is a pure online Journal (since 2012). Crystal Research and Technology is an international journal examining all aspects of research within experimental, industrial, and theoretical crystallography. The journal covers the relevant aspects of -crystal growth techniques and phenomena (including bulk growth, thin films) -modern crystalline materials (e.g. smart materials, nanocrystals, quasicrystals, liquid crystals) -industrial crystallisation -application of crystals in materials science, electronics, data storage, and optics -experimental, simulation and theoretical studies of the structural properties of crystals -crystallographic computing