The effects of silver additive on the superconducting properties of YBa2Cu,,10,..,:Ag., for x = 0.1, 0.3, 0.6 and 1.2 are studied by measuring the real and imaginary components of the magnetic response in an AC field. The data are fitted to Bean's critical state model and are used to obtain the macroscopic critical current density. The magneticsusceptibilityand criticalcurrent density are found to dependon the silver content whereas T, remains essentially unchanged. For x = 1.2 the critical current density sharply increases below 77 K. The results suggest that the silver improves the properties of grain boundaries and enhances the intergranular coupling. The real part of the magnetic response is found to be a function of H.IH". where H' is the value of the field when the critical-state profile reaches the centre of the specimen.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.