AC losses in YBCO coated conductors subjected to tensile stresses

The axial tensile stress dependences of AC transport current losses and magnetization losses in YBCO conductors, made by the IBAD/PLD (ion beam assisted deposition/pulse laser deposition) process, were investigated in the stress range 0–770 MPa. Measured transport current losses showed a slight stress dependence, which can be explained by the stress dependence of the critical current of the conductor Ic. The magnetization losses were less sensitive to the stress than the transport current losses. The tensile stress dependences of those losses can be estimated from the data for those losses at zero stress and stress dependent Ic.