AC magnetic field losses in BSCCO-2223 superconducting tapes

摘要

The AC magnetic losses at power frequencies (60 Hz) were investigated for mono- and multifilament Ag-sheathed (Bi, Pb)(sub 2)Sr(sub 2)Ca(sub 2)Cu(sub 3)O(sub y) (BSCCO-2223) tapes with similar transport critical current (I(sub c)) values at 77 K. The multifilament sample exhibited higher losses than the monofilament under the same conditions. Loss peaks are discussed in terms of intergranular, intragranular and eddy current losses. Because of BSCCO's anisotropy, field orientation has a large effect on the magnitude of these peaks, even at relatively small angles. Losses for fields applied parallel to the c-axis of the textured BSCCO grains are larger by more than one order of magnitude than those applied perpendicular.