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Optimization results for the growth of Bi-2212 single crystals by a modified vertical Bridgman method

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3 Author(s)
H. Tanaka ; Dept. of Electr. & Electron. Eng., Tottori Univ., Japan ; O. Nagashima ; S. Kishida

Bi2Sr2CaCu2O8+δ (Bi-2212) superconducting single crystals were prepared using starting materials with the compositions of Bi:Sr:Ca:Cu=x:2:1:y (x,y=2-3) by a modified vertical Bridgman method. We could obtain large plate-like single crystal with x=2 and y=2, which had a size of 18×5 mm2. In the single crystal, the FWHM value of the (0010) XRD peak which corresponds to Bi-2212 superconductor was small and about 0.05°. We also found that the single crystal showed a sharp transition in resistance-temperature characteristic when it was prepared using the starting materials with the compositions of Bi:Sr:Ca:Cu=2:2:1:3.

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:13 ,  Issue: 2 )