Abstract
The influence of post-growth short-term low-temperature annealings (O2, 400°C, 5–15 min) on the composition, crystal structure, and superconductivity of Bi2Sr2CaCu2O8 + δ and Bi2Sr2CuO6 + δ oxycuprate whiskers freely grown in gas cavities has been investigated. The optimal conditions for growth in closed gas cavities in a flux and post-growth annealing in oxygen were found, making it possible to obtain high-quality superconducting Bi 2212 and Bi 2201 whiskers in a wide doping range (from heavily underdoped to optimally doped) with a small rocking curve half-width (∼0.1°–0.2°) and narrow superconducting transition (ΔT = 1.5–2 K).
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Original Russian Text © J.I. Gorina, G.A. Kalyuzhnaja, M.V. Golubkov, V.V. Rodin, N.N. Sentjurina, V.A. Stepanov, S.G. Chernook, 2009, published in Kristallografiya, 2009, Vol. 54, No. 4, pp. 705–712.
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Gorina, J.I., Kalyuzhnaja, G.A., Golubkov, M.V. et al. The influence of low-temperature annealings on the structural and superconducting properties of Bi 2212 and Bi 2201 whiskers. Crystallogr. Rep. 54, 661–668 (2009). https://doi.org/10.1134/S1063774509040208
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DOI: https://doi.org/10.1134/S1063774509040208