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 77K) as a function of frequency and amplitude of a sinuso idally varying transport current. In the frequency range of 30-320 Hz the t ransport current losses are hysteretic in nature. The measurements of the s elf-field losses caused by the AC transport current as a function of the ma gnitude and orientation of the applied low external DC magnetic field (up t o 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 anomal y in angular critical current dependence on external magnetic field was obs erved.