Scaling Rules to Understand Current Limiting Mechanisms in High Temperature Superconductors

Abstract

An important property of high temperature superconducting conductors is their critical current density Jc(H). We seek regularities in the
Ic(H) curves of Ag/(Bi, Pb)2Sr2Ca2Cu3Ox conductors to better understand their current limiting mechanisms (CLM’s). Metallurgical
variations in Ag/Bi2223 conductors cause changes in Jc(H). One way we can try to understand these changes is by looking for scaling laws
for Jc(H). The Kramer model postulates scaling laws and explains reasonably well the relation of Jc(H) at high field in low temperature
superconductors. We use the Kramer model and scaling of volume pinning force density for different tapes of high temperature
superconductors to arrive at conclusions about the CLM’S in these conductors at high fields.