Growth Defects in Langasite Crystals Observed with White Beam Synchrotron Radiation Topography
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第1期
论文作者：Huang Wanxia Wang Xuping Zhu Peiping Zhao Hongyang Wang Jiyang Zhang Jianxiu Hu Xiaobo
Key words：Langasite (LGS crystal); growth striation; growth core; dislocation;
Abstract: Langasite single crystal was grown by the Czochralski method and its perfection was assessed by white beam synchrotron radiation topography. It is found that the growth core and the growth striations are the primary growth defects and they show strong X-ray kinematical contrast in the topographs. Another typical defect in LGS crystal is dislocation. The formation mechanisms of these growth defects in LGS crystals were discussed.
Huang Wanxia1，Wang Xuping2，Zhu Peiping1，Zhao Hongyang2，Wang Jiyang2，Zhang Jianxiu2，Hu Xiaobo2
(1.Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Beijing 100039, China;
2.State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China)
Abstract:Langasite single crystal was grown by the Czochralski method and its perfection was assessed by white beam synchrotron radiation topography. It is found that the growth core and the growth striations are the primary growth defects and they show strong X-ray kinematical contrast in the topographs. Another typical defect in LGS crystal is dislocation. The formation mechanisms of these growth defects in LGS crystals were discussed.
Key words:Langasite (LGS crystal); growth striation; growth core; dislocation;
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