Abstract
With a conventional X-ray rotating-anode diffractometer, structure characterization of a pure and highly oriented Bi 2Sr 2CaCu 2O y single crystal sheet with large dimensions of 5×1.8×0.03 mm 3 has been conducted. Incommensurate satellites corresponding to a modulation 0.21 b ∗+ c ∗ have been observed up to second order. Apart from the asymmetry in intensities of the symmetrically located satellites, we revealed one more characteristic of the modulated structure, that the satellites are stretched along the c ∗ direction to form poles in reciprocal space. The technique used is suggested to be convenient and practical for studies concerning especially the modulations for large crystals.
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