The power dissipation of high T c superconductors is an important factor to be evaluated for applications involving a.c. operation. We have investigated, by the electrical method, the a.c. losses of melt-textured YBa2Cu307\_x bars carrying 50 Hz alternating current at 77 K. The samples, prepared by
Magneto-thermal oscillations and flux jumps in melt-textured YBa2Cu3O7
β Scribed by G. Kumm; U. Ring; K. Winzer
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 436 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0011-2275
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β¦ Synopsis
Measurements
of magnetic instabilities in melt-textured YBa,Cu,O, are reported. Exposing the samples to an external varying magnetic field, flux jumps are observed which are preceded by oscillations of the magnetization and the temperature of the sample. In the discussion, a model which is based on local and integral non-adiabaticity is presented, which can explain the observations qualitatively.
π SIMILAR VOLUMES
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The superconducting transition and critical current density were studied for epitaxial YBa2Cu307\_x thin films as a function of temperature, magnetic field and electric voltage gradient. A linear section of the curve of the logarithm of apparent voltage versus transport current density, In(E)-J, was
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