Abstract
An all chemical route has been used to produce substrates-nanostructured by self-assembled oxide nanoislands-and to grow YBa2 Cu3 O7-x (YBCO) films on top. A great increase in the superconducting properties has been observed at high temperatures and magnetic fields parallel to the YBa2 Cu3 O7-x c -axis. The vortex pinning properties and the defects induced in the YBa2 Cu3 O7-x matrix have been investigated. We show that extended defects along the c -axis, induced in the YBCO matrix by the interfacial nanostructures, lay at the origin of the improved performances. © 2009 American Institute of Physics.
Original language | English |
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Article number | 172513 |
Journal | Applied Physics Letters |
Volume | 94 |
Issue number | 17 |
DOIs | |
Publication status | Published - 11 May 2009 |