Transport AC loss in YBCO coated conductor with transverse crack

The purpose of the experiments presented here is to explore the transport alternating current (AC) losses in YBa2Cu3O7−x coated conductor (YBCO CC) that contains a transverse crack. The experimental tests are performed using an improved local calorimetry method with high accuracy. We define a factor called c to describe the ratio between the AC losses of the specimen with and without the crack in terms of unit length. It is found that a power law curve between c and the crack length L coincides perfectly with the experimental results. In addition, we also find that the AC losses in the crack region are hysteretic losses.