AC magnetization loss reduction by striation in YBCO-123/Hastelloy coated conductors

In the work we present experimental results of AC magnetization losses reduction due to striation process in YBCO-123/Hastelloy coated conductors. The measurements were carried out in a sinusoidally varying external magnetic field, with amplitudes up to 100 mT, in a frequency range of 8.5-85.4 Hz, and at temperature of 77 K. The field was oriented perpendicularly to the face of the tapes. Sample tapes were successively patterned into a form of narrow, parallel strips, by means of a photoresist lithography and chemical wet etching technique. Experimental results are discussed in a framework of existing theoretical models for energy dissipation in thin films in perpendicular AC magnetic fields.