Synthesis of high-temperature superconducting yttrium-barium cuprate single crystals and study of their properties

M. V. Bakuntseva; P. P. Gorbic; I. V. Dubrovin; G. N. Kashin; I. V. Laguta; A. I. Nastasienko

M. V. Bakuntseva Інститут хімії поверхні НАН України
P. P. Gorbic Інститут хімії поверхні НАН України
I. V. Dubrovin Інститут хімії поверхні НАН України
G. N. Kashin Інститут хімії поверхні НАН України
I. V. Laguta Інститут хімії поверхні НАН України
A. I. Nastasienko Інститут хімії поверхні НАН України

Анотація

The method of synthesis of stack-plated single crystals of YBa₂Cu₃O₆₊_d high‑temperature superconductor has been improved. The method is based on combination of the processes of mass-nucleation and directional crystallization from the solution-melt by Czochralski. The single crystals with the natural cuts and plate habitus of 8 mm in length have been grown. Diffusion of silver from thin films (10-20 nm) into the YBa₂Cu₃O₆₊_d single crystals has been studied in the temperature range 373-773K with the use of Auger electron spectroscopy. Diffusion activation energy and pre-exponential factor have been determined. The mechanism with participation of oxygen vacancies has been suggested as a principal diffusion mechanism.

Посилання

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