Flux growth of Sr1−xCaxCuO2 single crystals

Lin, C.T.; Zhou, W.; Mackenzie, A. P.; Gauthier, F.; Liang, W.Y.

doi:10.1016/0022-0248(94)90498-7

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Flux growth of Sr_1−xCa_xCuO₂ single crystals

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Lin, C., Zhou, W., Mackenzie, A. P., Gauthier, F., & Liang, W. (1994). Flux growth of Sr_1−xCa_xCuO₂ single crystals. Journal of Crystal Growth, 140(1-2), 72-78. doi:10.1016/0022-0248(94)90498-7.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-E72B-0

Abstract

A series of single crystals of Sr1-xCaxCuO2, x = 0.19-0.83, has been grown using a low cooling rate in a flux containing excess CuO. Values of the temperature gradient, amount of flux, soaking temperature, soaking time, crucible material and cooling rate have been optimized. The chemical compositions for the as-grown crystals were determined by means of energy dispersive X-ray analysis (EDS) in a transmission electron microscope and confirmed by electron probe microanalysis (EPMA), while the SrCuO2-type structure having orthorhombic symmetry is confirmed by high resolution transmission electron microscopy (HREM). Both the Ca/Sr ratios in the crystals and the unit cell constants vary with a linear relationship with the Ca/Sr ratios in the initial melt.