X-ray and electron diffraction study of single crystal Bi2Sr2CaCu2Ox

Abstract

Using both x-ray and electron diffraction, we have studied the incommensurate modulation structure in single crystal Bi2Sr2CaCu2Ox. Electron diffraction clearly indicates a small a-axis component of the modulation wave vector k, along with the more familiar b-axis component (0.004a + 0.212b). This tilt of the k-vector breaks the mirror symmetry perpendicular to a- and b-axes as well as the twofold symmetry about a- and b-axes. The modulated structure thereby has only a mirror plane normal to the c-axis. Intense x-ray streaking along the c-axis at several satcllite reflections was considerably more pronounced than at the fundamental reflections, indicating a stacking disorder along the c-axis predominantly in the modulated structure.

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Correspondence to X. B. Kan.

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Kan, X.B., Kulik, J., Chow, P.C. et al. X-ray and electron diffraction study of single crystal Bi2Sr2CaCu2Ox. Journal of Materials Research 5, 73 (1990). https://doi.org/10.1557/JMR.1990.0731

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