Equivalent scheme for theV-Icharacteristics of Bi-2223/Ag tapes at 77 K

Abstract

A series-parallel equivalent scheme is proposed to obtain better understanding of the course of experimentally observed V-I characteristics of multifilament Bi-2223/Ag tapes at liquid nitrogen temperatures. The elements of the equivalent scheme reflect the intrinsic properties of the intergranular, respectively of the intragranular parts of the composite superconductor. The dependence on the transversal magnetic field as well on the relative orientation of the magnetic field with respect to the tape's broad face of two samples is presented and compared. The proposed method could offer better insight into the inner structure of the studied samples.