X-ray Structure Analysis of Bi2212 Using Synchrotron Source and High Dynamic Range Imaging Plate Detector

T. J. Lee ； C. F. Huang ； C. C. Teo ； T. S Khor ； H. C. Ku ； K. W. Yeh ； Y. Huang ； H. H. Hung ； Kiwako Sakabe ； Noriyoshi Sakabe

《Chinese Journal of Physics》 38卷2S期 (2000/04) Pp. 243-261

並列摘要

The traveling solvent floating zone method was applied in growing the single crystals of Bi2Sr2PrCu2O8+δ. Diffraction patterns of 0kl, 1kl, 2kl, 3kl, 4kl were obtained with the Weissenberg camera equipped with Fuji 400 imaging plate in Photon Factory, KEK. The wavelength of the photon is tuned to 1Å. With this energy, modulation peaks of ”order 3” can be recorded clearly. From the extinction conditions in the diffraction pattern indicate the main structure of the crystal can be attributed to orthorhombic Amaa. Using oscillation photograph and zero level Weissenberg photograph, cell lengths of the crystal were calculated to be a = 5.489(2), b = 5.526(5), c = 30.420(7) Å. The crystal possesses an incommensurate modulation along b direction, with modulation wave vector q = 0.243b* + c* and can be expressed as super space group: N^Amaa ¯111.