Progress of PLD and IBAD processes for YBCO wire in the SRL-Nagoya Coated Conductor Centre—new method for a coated conductor using a<i>self-epitaxial</i>PLD-CeO₂buffer

Abstract

The Nagoya Coated Conductor Centre (NCCC) in SRL has installed new reel-to-reel IBAD and PLD systems for the fabrication of long, coated conductors. A 53 m long ion-beam assisted deposition (IBAD) substrate has been successfully produced. The degree of bi-axial texturing was improved by the newly found buffer deposition technique of pulsed laser deposition- (PLD)-CeO2, which we call the self-epitaxial method. The PLD-CeO2 layer brought about a high degree of in-plane texturing up to 2.6° in a few minutes on an IBAD seed layer. The resultant YBCO coated conductor on the CeO2 layer showed high Jc values of up to 4.4 MA cm−2. The reel-to-reel PLD equipment with a high power laser of 200 W is now being applied to long-conductor fabrication and CeO2 buffer layer deposition with a high deposition rate.