Abstract
High-temperature superconductors can carry high non dissipative currents at low temperatures as long as quantized vortices are pinned. However, the currents in a magnetic field at liquid nitrogen temperature (77 K) are not sufficiently high for practical use due to the weak pinning. For the improvement of nondissipative currents in YBa2Cu3O 7-δ films, linear defects that extended to the c-axis of the film were introduced using a novel nanostructure technology. We observed a marked enhancement of the nondissipative currents even at 77 K and high fields when the fields were applied close to the c-axis. This is a clear demonstration of enhanced pinning using artificially incorporated pinning centers.
Original language | English |
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Pages (from-to) | L246-L248 |
Journal | Japanese Journal of Applied Physics, Part 2: Letters |
Volume | 44 |
Issue number | 1-7 |
DOIs | |
Publication status | Published - May 3 2005 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Engineering(all)
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)