Artificial pinning in thick YBCO films: Pinning potential and c-axis correlation

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

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.

Details

Original languageEnglish
Pages (from-to)840-843
Number of pages4
JournalPhysica C Superconductivity
Volume470
Issue number19
Early online date20 Feb 2010
Publication statusPublished - 1 Oct 2010

Keywords

  • YBCO films, Artificial pinning centres