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Effect of Temperature on La1.85Sr0.15CuO4 Single Crystal Growth by Floating Zone Method

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Abstract:

Superconducting single crystals of La1.85Sr0.15CuO4 have been grown at various temperatures without single crystal seeds by the traveling-solvent floating-zone method. In order to avoid the formation of bubbles during the crystal growth process, a flowing atmosphere of 2 atm oxygen or 1 atm air was applied in different temperature range. It was found that the crystal quality could be improved by raising the growth temperature in a certain range, and the orientation changed from (110) to (100) at higher temperature. X-ray diffraction results showed that the full-width at half-maximum of the best as-prepared crystal was 0.086°. The crystals grown in 2 atm oxygen showed a superconducting transition temperature (Tc) of 37.3 K, while the crystals grown in floating air showed a Tc of about 35 K and it could be improved to 36.5 K by annealing in flowing oxygen.

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Periodical:

Materials Science Forum (Volumes 546-549)

Pages:

1897-1900

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.546-549.1897

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Online since:

May 2007

Authors:

X.Q. Xiang, J.F. Qu, Y.Q. Zhang, X.L. Lu, X.G. Li

Keywords:

Floating Zone, Orientation, Single Crystal Growth, Temperature

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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