Abstract
We have introduced artificial pinning centres in thick (>1 μm) YBCO films grown by Pulsed Laser Deposition using substrate decoration, quasi-multilayers, and target doping approaches. We have found that the frequency dependence of critical current density is consistent with a logarithmic dependence of pinning potential on current density. For most of materials used as nano-dots, artificially-induced pinning centres have a larger potential than natural ones. From angle-dependent in-field transport measurements and from Transmission Electron Microscopy we have found evidence of c-axis correlated pinning centres.
Original language | English |
---|---|
Pages (from-to) | 840-843 |
Number of pages | 4 |
Journal | Physica C Superconductivity |
Volume | 470 |
Issue number | 19 |
Early online date | 20 Feb 2010 |
DOIs | |
Publication status | Published - 1 Oct 2010 |
Keywords
- YBCO films
- Artificial pinning centres