Flux growth of Bi-Sr-Ca-Cu-O (2212) single crystals with temperature cycling
Abstract
The growth of Bi2Sr2Ca1Cu2Oy (Bi 2212) single crystals from high-temperature solutions has been done using either self-flux or alkali halide fluxes. These were aimed at optimizing its growth parameters as well as the production of single crystals of appropriate dimensions for proper characterization. At present, the largest Bi 2212 single crystals reportedly grown using the flux method are merely platelets that average around 10 mm2 x 10 μm in dimensions. In this study, the solubility curve of the 2212 pseudobinary system of Bi and KCl was initially constructed in order to approximate the metastable regions vital for nucleation. The usual slow cooling processes that included temperature cycling and an isothermal step were used. Kinetic variables were estimated using the Arrhenius relation and the two-dimensional nucleation theory. The following assumptions are adopted: (1) thermal diffusivity exceeds mass diffusivity by 103 so that heat dissipation is rapid and an isothermal solution is a valid approximation; and (2) diffusion in the solution is the rate-limiting step, which implies that reaction kinetics and diffusion through the product layer are negligible.
Downloads
Published
Issue
Section
License
By submitting their manuscript to the Samahang Pisika ng Pilipinas (SPP) for consideration, the Authors warrant that their work is original, does not infringe on existing copyrights, and is not under active consideration for publication elsewhere.
Upon acceptance of their manuscript, the Authors further agree to grant SPP the non-exclusive, worldwide, and royalty-free rights to record, edit, copy, reproduce, publish, distribute, and use all or part of the manuscript for any purpose, in any media now existing or developed in the future, either individually or as part of a collection.
All other associated economic and moral rights as granted by the Intellectual Property Code of the Philippines are maintained by the Authors.
