Low angle grain boundary transport in YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} coated conductors

Journal Article · Sun Mar 26 23:00:00 EST 2000 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.126157· OSTI ID:20215697

Verebelyi, D T ^[1]; Christen, D K ^[1]; Feenstra, R ^[1]; Cantoni, C ^[1]; Goyal, A ^[1]; Lee, D F ^[1]; Paranthaman, M ^[1]; Arendt, P N ^[2]; DePaula, R F ^[2]; Groves, J R ^[2]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6061 (United States)
2. Superconductivity Technology Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

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, YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} [001]-tilt boundaries reduce J{sub c} exponentially with increasing misorientation angle ({theta}). We pursue the low-{theta} 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 J{sub c} is applicable for {theta}(greater-or-similar sign)4 degree sign , where the spacing between the periodic disordered regions along the GB become smaller than a coherence length. (c) 2000 American Institute of Physics.

• OSTI ID: 20215697
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 13 Vol. 76; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
ELECTRIC CONDUCTIVITY
EXPERIMENTAL DATA
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
POLYCRYSTALS
SUPERCONDUCTING WIRES
YTTRIUM OXIDES