The current distribution in a striated YBCO tape subjected to both a magnetization and a transport current

In this work we have quantified the results concerning the current distribution and the values of the full magnetization current If during a complete cycle of an externally applied magnetic field, Bext. A YBa2Cu3O7−x-coated conductor in the form of a striated tape 12 mm wide and 100 mm long, with unstriated ends, was exposed to a gradually changing external magnetic field. For every selected phase of the initial cycle of the magnetic field (first cycle after cool-down), the perpendicular component of the self-field profile over the center of the tape was measured. The Tikhonov method of regularization was used in the inverse calculation of the current distribution. For every quarter of the cycle the magnetization current distribution profiles corresponding to different levels of gradually changing external magnetic field Bext were plotted. After finishing the whole cycle, the external magnetic field was eliminated upon returning to a zero level and the gradual ramping of a transport current was commenced. The change in current distribution because of the increasing transport current took place only in the non-saturated half-width of the tape current profile.