Open AccessX-RAY DIFFRACTION STUDY OF THE MODULATED STRUCTURE IN Bi2Sr2CaCu2Oy SINGLE CRYSTALS
Author(s) -
旭光 鄭,
Zhao Xiao-Ru,
Wenbin Wu,
Xiaofeng Sun,
Liangbin Wang,
Guien Zhou,
Xiaoguang Li,
Yuheng Zhang
Publication year - 1996
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.45.1578
Subject(s) - bravais lattice , superlattice , monoclinic crystal system , orthorhombic crystal system , materials science , diffractometer , condensed matter physics , lattice (music) , diffraction , crystallography , crystal structure , brillouin zone , single crystal , reciprocal lattice , optics , physics , chemistry , acoustics
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.