1999/07/19 by B. des Ligneris, Benoit des Ligneris, Ligneris, Benoit des +10
Materials Science · Physics and Astronomy · #Magnetic Properties and Applications #Physics of Superconductivity and Magnetism #Surface and Thin Film Phenomena #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/9907271
7 pages, 6 figures, CEC-ICMC 99 (Montreal) IB6 - minor changes
arxiv created 1999/07/20 · arxiv updated 2009/11/30
The ac losses in a silver-gold alloy sheathed Bi-2223 tape were measured by the null calorimetric method while a dc current was superimposed onto the ac current. As expected through computer simulations, a Clem valley was observed for the larger ac currents. A reduction of ac losses of approximately 50% at the valley minimum is observed in accord with the calculations. At lower ac currents, the data fit the calculated behavior with a single parameter, a Meissner current of 21.8 A. It is shown that a surface barrier current is incompatible with the data.