首页 | 本学科首页   官方微博 | 高级检索  
     


Optical and atomic force microscopic study on step bunching in BaB2O4 crystal growth
Authors:Pan Xiu-Hong  Jin Wei-Qing  Liu Yan  Ai Fei  Jin Fei  Xie Jun-Jie
Affiliation:Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Abstract:The formation of macrostep during high-temperature phase of barium meta-borate (α-BaB2O4) single crystal growth has been investigated by both optical in-situ observation system and atomic force microscopy (AFM). The in-situ observation results demonstrate that the critical linear size of growing facet exceeding the size that the macrostep generates is significantly anisotropic. The critical linear sizes are around 280 μm and 620 μm for {1010} and {1010} planes, respectively. AFM study illustrates that macrostep train with a height of 150 nm ~ 200 nm is one typical morphological feature of the as-grown crystal surface. The riser of each macrostep consists of several straight and parallel sub-steps, indicating the occurrence of step bunching. Additionally, triangular sub-steps with heights of several nanometers on the treads of the macrosteps are found to be another typical feature of surface morphology, which implies a microscopically competitive bunching of sub-steps between various crystallographic orientations.
Keywords:step bunching  optical in situ observation  atomic force microscopy  BaB2O4 crystal
本文献已被 维普 等数据库收录!
点击此处可从《中国物理 B》浏览原始摘要信息
点击此处可从《中国物理 B》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号