DOI: 10.1063/10.0032002 ISSN: 0360-0335
Critical current of ceramic oxides YBa2Cu3Ox in weak magnetic fields
L. S. Kokhanchik, V. A. Marchenko, T. V. Nikiforova, A. V. NikulovA dependence of critical current in ceramic samples YBa2Cu3Ox on the past magnetic history is discovered. This phenomenon is explained by using the critical state model, taking into account the microstructure of the samples. The values of the lower critical field and of the critical current density of grains are estimated.