The critical current anisotropy of the Ag-(Bi Pb)<sub>2</sub>Sr<sub>2</sub>Ca<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub> tape form conductor
B A Glowacki; Wai Lo; J E Evetts; B A Glowacki; IRC in Superconductivity, Cambridge Univ., UK; Wai Lo; IRC in Superconductivity, Cambridge Univ., UK; J E Evetts; IRC in Superconductivity, Cambridge Univ., UK
Журнал:
Superconductor Science and Technology
Дата:
1992-01-01
Аннотация:
The results of a study of anisotropy in the transport critical current (I<sub>c</sub>), at 77K, under a magnetic field for textured Ag-(Bi Pb)<sub>2</sub>Sr<sub>2</sub>Ca<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub> tapes as a function of two separate angular rotation sequences, are presented. The measurements show that for a given magnetic field both of the angular rotation sequences give identical values for I<sub>c</sub>( mu <sub>O</sub>H) versus the angle of rotation and the above function can be fitted by the mod cos( phi , psi ) mod <sup>- alpha </sup>, where the scaling parameter alpha is a function of the magnetic field and the microstructure of the tapes. The influence of the relaxation of the trapped magnetic flux on I<sub>c</sub> mod mod H and I<sub>c</sub> perpendicular to H is presented.
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