Growth, Structure and Transmission Spectrum of A New Type GYSGG(GdxY3-xSc2Ga3O12) Crystal

doi:10.15541/jim20140002

Abstract

Abstract:

A new GYSGG (Gd_0.63Y_2.37Sc₂Ga₃O₁₂) crystal with high quality was successfully grown by Czochralski method. The structure and transmission spectrum were investigated. The lattice constant of GYSGG was larger than those of the currently used crystals GGG and CaMgZr:GGG, ranging in YSGG and GSGG. The crystal substrate with various lattice constants can be obtained for applications by adjusting the proportions of Gd and Y in the GYSGG crystal. Further, the rocking curves of three different crystalline faces exhibit symmetric shape and small full width at half maximum (FWHM), suggesting that the crystal has good crystalline integrity. The dislocation etching pits of three different crystalline faces were also investigated. The transmission spectrum indicates that the crystal has a wide band in transmission, from which the refractive index curve is calculated and sellmeier equation coefficients are fitted. Therefore, the GYSGG is not only an excellent laser host crystal, but also a window material with wide wave band, suggesting that it has potential applications as new magnetic bubble substrate with an adjustable and larger lattice constant.

Key words: GYSGG crystal, lattice constant, rocking curve, dislocation, transmission spectrum

CLC Number:

O786

CHENG Mao-Jie, SUN Dun-Lu, LUO Jian-Qiao, ZHANG Hui-Li, CHEN Jia-Kang, ZHANG Qing-Li, YIN Shao-Tang. Growth, Structure and Transmission Spectrum of A New Type GYSGG(Gd_xY_3-_xSc₂Ga₃O₁₂) Crystal[J]. Journal of Inorganic Materials, 2014, 29(10): 1077-1081.

Figures/Tables 9

Fig. 1 As-grown GYSGG(Gd0.63Y2.37Sc2Ga3O12) crystal

Fig. 2 X-ray powder diffractive patterns of GYSGG and other containing gallium garnet crystals

Fig. 3 Structure schematic of the GYSGG crystal

Table 1 Lattice parameters of some containing gallium garnet crystals

Crystal	GGG	YSGG	CaMgZr:GGG	GYSGG	GSGG
Lattice constant /nm	1.2373	1.2426	1.2480	1.2507	1.2554
(444) diffractive angle (2θ)	51°7°	50º44°	50°43°	50°40°	50°22°

Fig. 4 Rocking curves of GYSGG crystal at three different crystalline faces

Fig. 5 Dislocation etch pits of GYSGG crystal at three different crystalline faces

Fig. 6 Atomic arrangement schematics viewed at different crystalline directions for the GYSGG crystal

Fig. 7 Transmission spectrum of GYSGG crystal Inset is the refractive index curve of GYSGG crystal

Table 2 Sellmeier equation coefficients of refractive index of GYSGG crystal

A	B/μm²	C/μm²	D/μm²
3.49189	0.11634	0.07578	0.01498

References 12

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Growth, Structure and Transmission Spectrum of A New Type GYSGG(Gd_xY_3-_xSc₂Ga₃O₁₂) Crystal

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