The anomalous unloaded quality factor behavior of high T c superconducting microstrip resonator in weak dc magnetic field

Abstract

This paper reports the anomalous behavior of unloaded quality factor (Q u) of high T c superconducting (HTSC) microstrip resonator in weak dc magnetic field (B dc). The Q c behavior increases with the elevated applied B dc, but beyond the certain B dc value, decreases linearly with B dc. We speculate that this behavior may be caused by edge effect. The behavior is modeled both by the coupled-grain model accounting for a distribution of the grain dimension and Coffey-Clem model. © 2000 Plenum Publishing Corporation.