Propagation of AC magnetic field through high-T<SUB>c</SUB> coatings

Studies on the propagation of AC magnetic field through plasma-sprayed superconducting Y1Ba2Cu3O7-x coatings show that complete shielding is achieved up to a certain critical magnetic field strength H0. Increase in the thickness or Jc 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 Jc