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50 Hz self-field losses in melt-textured YBa2Cu3O7−x bars

✍ Scribed by S Zannella; L Jansak; K Salama; V Selvamanickam

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
315 KB
Volume
33
Category
Article
ISSN
0011-2275

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✦ Synopsis

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 a Bridgman-type directional solidification method, were characterized by a,b-planes, oriented along and 45 ° off the sample length. The results are presented and discussed in terms of the critical state model with the evidence of a surface barrier against flux penetration.

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