Electron Microscopy and X-ray Structural Investigations of Incommensurate Spin-Ladder Sr4.1Ca4.7Bi0.3Cu17O29 Single Crystals
P. Dłużewskia, A. Pietraszkob, M. Kozłowskia, A. Szczepańskaa, J. Góreckaa, M. Barana, L. Leonyukc, G.-J. Babonasd, O. Lebedeve and R. Szymczaka
aInstitute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
bInstitute of Low Temperature and Structure Research, 50-422 Wrocław, Poland
cGeological Department, Moscow State University, 119899 Moscow, Russia
dSemiconductor Physics Institute, 2600 Vilnius, Lithuania
eUniversity of Antwerp RUCA, 2020 Antwerp, Belgium
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Received: September 4, 2000; in final form October 20, 2000
Transmission electron microscopy and X-ray diffraction proved chain ladder incommensurate single crystal structure of investigated samples. The incommensurate ratio was determined from the X-ray and electron diffraction being equal to 0.704. Diffuse scattering intensities localised on the planes perpendicular to the c*-axis and passing through the spots originating from the periodicity of chain sublattice were detected. High-angle grain boundary or twinning formed by rotation of 33.3° around [100] direction was observed. High-resolution electron microscopy images revealed the stacking faults in ac planes.
DOI: 10.12693/APhysPolA.98.729
PACS numbers: 74.72.-h, 61.16.Bg, 61.10.-i, 61.72.Nn, 61.72.Mm