Systematic Behaviors of ab-plane Pinning Variations in a Practical Length Wire Fabricated by the MOD/RABiTS Process

In-field critical current I c variations, detected using a short sample, angular I c (77K, H=5.2kOe, Angle) measurement on the ends of a 20 m coated conductor tape fabricated by the MOD / RABiTS process, are shown to be variations in the I c (H) anisotropy that exist on sub-centimeter length scales. A I c (75 K, H, Angle) study was performed on segments cut from the tape where the power law exponent of the field dependence, α, I c ~H -α was calculated for I c (H, Angle) data. Two extrema behaviors, anisotropic and isotropic, were identified. The isotropic material is shown to outperform the anisotropic material for a wide range of fields and angles at T=26 K.