LOSSES IN AC OF BSCCO-2223 SUPERCONDUCTING MONOFILAMENT AND MULTIFILAMENT TAPES AT POWER FREQUENCIES

The ac magnetic losses at power frequencies (60 Hz) were investigated for mono-and multifilament Ag-sheathed (Bi, Pb)(2)Sr2Ca2Cu3Oy (BSCCO-2 223) tapes with similar I-c values at 77 K. The multifilament sample e xhibited higher losses than the monofilament under the same conditions . Loss peaks are discussed in terms of intergranular, intragranular, a nd eddy current losses. Because of BSCCO's anisotropy, field orientati on has a large effect on the magnitude of these peaks, even at relativ ely small angles. Losses for fields applied parallel to the c-axis of the textured BSCCO grains are larger by over an order of magnitude tha n those applied perpendicular.