Angular dependence of AC transport current losses in biaxially aligned Ag/YBCO-123/YSZ/Hastelloy coated conductor

AC transport losses in a biaxially aligned YBCO-123 tape (10 cm in length) were measured (at 77 K) as a function of frequency and amplitude of a sinusoidally varying transport current. In the frequency range of 30-320 and the transport current losses are hysteretic in nature. The measurements of the self-field losses caused by the AC transport current as a function of the magnitude and orientation of the applied low external DC magnetic field (up to 150 mT) are also reported. The external magnetic field was rotated in the range of +120 to -120 degrees with respect to the plane of the tapes, and was in all cases perpendicular to the transport current flow. Strong anomaly in angular critical current dependence on external magnetic field was observed.