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物理学报. 1996, 45(9): 1578-1585.
doi: 10.7498/aps.45.1578.
Bi2Sr2CaCu2Oy单晶调制结构的X射线衍射研究
- 收稿日期: 1995-06-01
- 修回日期: 1995-11-02
- 刊出日期: 1996-09-20
摘要: 用Ｘ射线转靶衍射仪，详细地观察和分析了Bi2Sr2CaCu2Oy单晶的调制结构．指出布喇格反射的卫星峰是沿ｃ*拉长的，与Ｂ心正交对称结构不相符的宽化峰正是由于这种拉长的结果，且导致卫星峰强度的不对称性．Ｂｉ-Ｏ层和钙钛矿层晶格失配形成的超晶格为非正交而是单斜的，并可能存在超晶格孪晶
English Abstract
X-RAY DIFFRACTION STUDY OF THE MODULATED STRUCTURE IN Bi2Sr2CaCu2Oy SINGLE CRYSTALS
- Received Date:
01 June 1995
- Accepted Date:
02 November 1995
- Published Online:
20 September 1996
Abstract: The modulated structure of Bi2Sr2CaCu2Oy single crystals has been observed and studied in detail with an X-ray rotating-anode diffractometer, indicating that the satellites of Bragg reflections are stretched along the c* direction in reciprocial space. It is the result of the stretch that the widened peaks are incompatible with a B-centered orthorhombic bravais lattice , and the intensities of satellites become asymmetry. The superlattice based on the lattice mismatch is not orthorhombic but monoclinic and perhaps forms superlattice twin structure in Bi-2212 single crystals.
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