AC transport losses of textured Ag(Bi,Pb)2Sr2Ca2Cu3Ox tapes

✍ Scribed by A. Oota; T. Fukunaga; M. Matsui

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 360 KB
• Volume: 265
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(96)00284-5

✦ Synopsis

The mechanism which generates the AC transport losses under self-fields in textured Ag-(Bi,Pb)2Sr2Ca2Cu30 x monofilament tapes depends upon the area ratio SAg/Ssc of silver to superconductor core in the cross section rather than the core geometry. In the screen-printed tapes with SAs/Ssc = 13 and 26, the hysteresis loss dominates the transport losses at around a commercial frequency 50 Hz but the eddy-current loss becomes significant as frequency increases up to 1 kHz. This is compared with the result for the Ag-sheathed tape with SAs/Ssc = 1.3 that the main contribution comes from the hysteresis loss between 10 Hz and 1 kHz. The hysteresis loss derived from the loss data is determined by the critical current of the sample independent of the core geometry. An increase in the number of filament in the screen-printed tape, as well as in the Ag-sheathed tape, does not influence the hysteresis loss because multifilaments behave as a solid superconductor for movement of magnetic flux.