Abstract
The temperature and AC field amplitude variations of AC susceptibility have been measured on pure and 5 wt% Ag doped (La 1− x Y x ) 2Ba 2CaCu 5O z superconductors. The AC susceptibility as a function of field have been analyzed using Kim's critical state model. The temperature dependence of intergranular critical current density and the effective volume fractions of the grains have been estimated. The Ag doped samples show relatively large critical current density due to the improved intergranular coupling. The exponent of temperature variation of critical current density suggests that the weak links form superconductor–normal metal–superconductor (SNS) type of junctions for all the samples.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call