Dependence of the Angular Anisotropy of the Critical Current Density on Texture in Silver-Sheathed Bi-2223 Tapes
The dependence of the critical current density Jc on the direction of an applied magnetic field B with respect to the normal to a Bi-2223 silver sheathed tape was determined for several mono- and multifilament tapes at both high and low temperatures. It is found that the angular dependence of Jc can be described by Jc⊥ (Bcos(φ)), where Jc⊥(B) is the field dependence for B normal to the tape plane, and φ is the angle from the normal. However, as φ approaches 90° (parallel to the tape plane), Jc deviates from this relation because of residual grain misorientation. A model for this has been developed which fits the data well and shows correlation with x-ray rocking curve estimates of the grain orientation distribution width.
KeywordsCritical Current Density Grain Orientation Tape Rolling Transport Critical Current Density Flux Vortex
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