Magnetization Measurements of Hard Superconductors under Dissipative Transport

J. L.GIORDANO; J. LUZURIAGA; I. A. RUÍZ TAGLE; G. NIEVA; A. BADÍA MAJÓS

Vienna, Austria

Conferencia; 7th European Conference on Applied Superconductivity (EUCAS); 2005

The hysteretic magnetic flux dynamics of ceramic type-II superconductors under superimposed transport current cycles has been investigated.Field cooled and zero field cooled experiments were carried-out on polycrystalline YBa2Cu3O7-x cylinders by using both temperature and applied field control, to drive the sample into the semi-reversible granular regime. The transport current magnitude was near and above the dissipative threshold. The interplay between shielding and transport due to vortex-pinning interactions, equilibrium magnetization effects, and diamagnetic/paramagnetic relaxation phenomena are shown to play an important role in the range of practical applications.