Controlled Introduction of Flux Pinning Centers in YBa2Cu3O7-x Films during Pulsed-Laser Deposition (Postprint)
Abstract
To introduce controlled random inclusion of nanometer-sized nonsuperconducting particulates in YBa2Cu3O7-x films for flux pinning enhancement, a special pulsed-laser-ablation YBa2Cu3O7-x target with a Y2BaCuO5 sector was made and the films were deposited on LaAlO3 substrates. Initial results showed that the films consist of 10-20 nm-sized precipitates. In a 0.5 micron thick film, a transport critical current density (Jc) >3 MA/sq cm at 77 K in self-field was measured. Magnetization Jc at 77 and 65 K showed significant improvements in these films with fine precipitates as compared to regular YBa2Cu3O7-x films (>10 times increase at 9 T, 65 K).
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2012
- Accession Number
- ADA559159
Entities
People
- C. Varanasi
- J. Carpenter
- John H. Burke
- Paul N. Barnes
- Timothy J. Haugan
Organizations
- Air Force Research Laboratory