Inter- and intragrain transport measurements in YBa2Cu3O7−x deformation textured coated conductors

D. M. Feldmann, D. C. Larbalestier, D. T. Verebelyi, W. Zhang, Q. Li, G. N. Riley, R. Feenstra, A. Goyal, D. F. Lee, M. Paranthaman, D. M. Kroeger, D. K. Christen
2001 Applied Physics Letters  
Using photolithography, links for transport measurement have been placed across individual Ni grain boundaries and within individual Ni grains on several coated conductor samples. The typical Ni grain size is ϳ50 m, while the YBa 2 Cu 3 O 7Ϫx grains are submicron in size. It is found that the intragrain J c (0 T,77 K) can exceed 5 MA/cm 2 , thus showing that present coated conductor J c values are not significantly limited by the intragrain J c . Inter-and intragrain J c values ranged from
more » ... es ranged from one-half to more than four times full-width measured values, demonstrating that current percolates through the conductor. The misorientation angle dependence of J c fits well with previous studies of ͓001͔ tilt SrTiO 3 bicrystals.
doi:10.1063/1.1425952 fatcat:btxlhxn2lnanphtoletvpuhffu