Process-induced flux pinning in melt-textured YBCO superconductor
β Scribed by K. Salama; V. Selvamanickam; D.F. Lee
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 245 KB
- Volume
- 209
- Category
- Article
- ISSN
- 0921-4534
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β¦ Synopsis
In this paper, we summarize two processing approaches which have been used to produce pinning centers in melt-textured YBCO resulting in the enhancement of current density. The first approach is the addition of nonsuperconducting inclusions such as Y2BaCuO5, and the second is high temperature mechanical deformation to generate dislocations and stacking faults.
π SIMILAR VOLUMES
In collective pinning theory, vortex pinning energy, U, is a key parameter in describing thermally activated flux motion, but it is a function of the critical current density J c , glassy exponent l and pinning energy U 0 , under the base of GriessenΓs and our groupΓs methods of obtaining J c and l,
The flux pinning mechanism of YBaCuO superconductors produced using a melt process was investigated by measuring the magnetic field dependence of transport critical current densities (Jc) at 77 K. Superconductors produced by the melt process had high transport Jc values and the magnetic field depend