Chen, C. ; Wondre, F. R. ; Hodby, J. W. ; Ryan, J. F. ; Narlikar, A. V. ; Samanta, S. B. (1999) Relationship between growth, structure and superconductivity of single crystal YBa2Cu3O7-δ Journal of Low Temperature Physics, 117 (3-4). pp. 711-715. ISSN 0022-2291
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Official URL: http://www.springerlink.com/content/q701j0n36208x5...
Related URL: http://dx.doi.org/10.1023/A:1022589010421
Abstract
We study the crystal growth of YBa2Cu3O7-δ with additives, using ac susceptibility, X-ray diffraction and STM. One specific additive, BaF2 , dramatically improves both the crystal growth and the superconducting properties. A cluster growth model is proposed to describe the function of the additive. F– reduces the Al contamination of Cu-O chains, and the orthorhombicity increases. On a nanometer scale, the roughness of the chains decreases markedly. Superconductivity is further enhanced using non-contaminating crucibles. Large single crystals with TC = 93.7 K and ΔTC = 0.1K were grown in Y2O3 or BaZrO3 crucibles using the BaF2 additive.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer. |
| ID Code: | 32611 |
| Deposited On: | 19 Mar 2011 06:34 |
| Last Modified: | 09 Jun 2011 11:17 |
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