Low angle grain boundary transport in YBa2Cu3O7Àd coated conductors
- ORNL
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, YBa2Cu3O72d @001#-tilt boundaries reduce Jc exponentially with increasing misorientation angle ~u!. We pursue the low-u 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 u*4°, where the spacing between the periodic disordered regions along the GB become smaller than a coherence length.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- DOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 829261
- Report Number(s):
- P99-105485
- 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
Similar Records
Coated conductor development : an assessment.
Grain boundary networks in high-performance, heteroepitaxial, YBCO films on polycrystalline, cube-textured metals