Low angle grain boundary transport in YBa2Cu3O7-δ coated conductors

D. T. Verebelyi, D. K. Christen, R. Feenstra, C. Cantoni, A. Goyal, D. F. Lee, M. Paranthaman, P. N. Arendt, R. F. DePaula, J. R. Groves, C. Prouteau

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163 Scopus citations

Abstract

Second generation, high-temperature superconducting wires are based on buffered, metallic tape substrates of near single crystal texture. Strong alignment of adjacent grains was found to be necessary from previous work that suggested large angle, YBa2Cu3O7-δ [001]-tilt boundaries reduce Jc exponentially with increasing misorientation angle (θ). We pursue the low-θ regime by evaluating single grain boundaries (GB) and biaxially aligned polycrystalline films utilizing both the rolling-assisted biaxially textured substrates and ion-beam assisted deposition coated conductor architectures. Analysis concludes that an exponential dependence on Jc is applicable for θ≳4 °, where the spacing between the periodic disordered regions along the GB become smaller than a coherence length.

Original languageEnglish
Pages (from-to)1755-1757
Number of pages3
JournalApplied Physics Letters
Volume76
Issue number13
DOIs
StatePublished - Mar 27 2000

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