Anisotropy of critical current density in textured Bi2Sr2Ca1Cu2O<i>x</i> tapes

Abstract

Anisotropy in Jc with respect to field direction for a textured Bi2Sr2Ca1Cu2Ox tape was measured at various temperatures and magnetic fields. Anisotropy at 4.2 K was small enough for practical applications in fields up to 25 T. However, the anisotropy increases rapidly with increasing temperature. Angular dependence of Jc shows a history effect, which is characteristic of ceramic superconductors.