Anisotropic AC Behavior of Multifilamentary Bi-2223/Ag Tapes
arXiv:cond-mat/0308344 · doi:10.1109/TASC.2003.812079
Abstract
In this communication, we report on the anisotropy of the superconducting properties of multifilamentary Bi-based tapes experimentally investigated by AC magnetic susceptibility measurements. The susceptibility $Ï= Ï' - j Ï''$ was measured using a commercial system and a couple of orthogonal pick-up coils. The $Ï''$ vs. temperature curves were shown to exhibit two peaks. The smaller of the peaks, occurring near T = 72K, was only visible for particular field directions and within a given frequency window. Such results point out the role played by the phase difference between the applied magnetic field and the internal magnetic field seen by the filaments.
4 pages (2 columns); 4 figures