Artificial pinning in thick YBCO films: Pinning potential and c-axis correlation |
| |
Authors: | Adrian Crisan Pavlo Mikheenko Asis Sarkar Van Son Dang Mohammed M. Awang Kechik John S. Abell Petriina Paturi Hannu Huhtinen |
| |
Affiliation: | 1. School of Metallurgy and Materials, University of Birmingham, B15 2TT Birmingham, UK;2. National Institute of Materials Physics, Bucharest 077125, Romania;3. Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Finland |
| |
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. |
| |
Keywords: | YBCO films Artificial pinning centres |
本文献已被 ScienceDirect 等数据库收录! |
|