| Optical and atomic force microscopic study on step bunching in BaB2O4 crystal growth |
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| 作者姓名： | 潘秀红 金蔚青 刘岩 艾飞 金飞 解俊杰 |
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| 作者单位： | Shanghai Institute of Ceramics,Chinese Academy of Sciences |
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| 基金项目： | Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 50802105). |
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| 摘 要： | The formation of macrostep during high-temperature phase of barium meta-borate (α-BaB 2 O 4) single crystal growth has been investigated by both optical in-situ observation system and atomic force microscopy (AFM).The insitu 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.
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| 关 键 词： | step bunching optical in situ observation atomic force microscopy BaB 2 O 4 crystal |
| 收稿时间： | 2010-05-10 |
Optical and atomic force microscopic study on step bunching in BaB2O4 crystal growth |
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| Pan Xiu-Hong,Jin Wei-Qing,Liu Yan,Ai Fei,Jin Fei and Xie Jun-Jie.Optical and atomic force microscopic study on step bunching in BaB2O4 crystal growth[J].Chinese Physics B,2011,20(2):28102-028102. |
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| Authors: | Pan Xiu-Hong Jin Wei-Qing Liu Yan Ai Fei Jin Fei and Xie Jun-Jie |
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| Institution: | 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 |
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| 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. |
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| Keywords: | step bunching optical in situ observation atomic force microscopy BaB2O4 crystal |
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