FIELD-ANGLE DEPENDENCE OF ALTERNATING-CURRENT LOSS IN MULTIFILAMENTARY HIGH-T-C SUPERCONDUCTING TAPES

The energy loss in multifilamentary superconducting tapes has been mea sured for various orientations of the external ac magnetic field. When the ac loss in parallel and perpendicular fields is known, the loss a t intermediate field angles can be predicted over a wide range of fiel d amplitudes. The prediction is based upon the following assumptions: For low-field amplitudes, the current patterns that would be induced i n the tape by the parallel and perpendicular field components can be s ummed. For high-field amplitudes, the tape only carries the current pa ttern induced by the perpendicular field component. These assumptions are supported by theory. (C) 1997 American Institute of Physics.