A dataset of investigation on the growth and properties of six garnet single crystals with large lattice constants

Large lattice constant Y3Al5O12 (YAG), Gd3Ga5O12 (GGG), Y3Sc2Ga3O12 (YSGG), Gd3Sc2Ga3O12 (GSGG), Ca0.4Mg0.25Zr0.65Gd2.6Ga4.1O12 (CaMgZr:GGG) and Gd1.17Y1.83Sc2Ga3O12 (GYSGG) substrate crystals with 2 inches in diameter were grown by the Czochralski (Cz) method, their physical, chemical and optical properties were 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 were 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 were measured to be 11.72, 8.98, 6.83, 5.45, 4.67 and 4.66 W/(m*K), respectively. It is found that the thermal expansion coefficients of six crystals can be reduced by annealing at 1000 ℃ for 60 hours. In addition, the transmission spectra show that the six crystals have excellent transparency, and the coefficients of the Sellmeier equation were 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.