Propagation of AC magnetic field through high-T_c coatings

Abstract

Studies on the propagation of AC magnetic field through plasma-sprayed superconducting Y₁Ba₂Cu₃O_7-x coatings show that complete shielding is achieved up to a certain critical magnetic field strength H₀. Increase in the thickness or J_c of the specimen increases the H₀ value. Flux-trapping occurs in the specimen at high frequencies and the frequency at which it occurs increases with increase in specimen J_c.