Application of Nd:YAG laser to preparation of REBa2Cu3Oz films for wire processing (RE: Y or rare-earth element)

摘要

Fourth harmonics of Nd:YAG (neodymium-doped yttrium-aluminum-garnet) laser at 266 nm was used for pulsed-laser-deposition (PLD) method to prepare (Y1−xHox)Ba2Cu3Oz (x=0, 0.3, 0.5, 0.7 and 1) films on (100) SrTiO3 (STO) single crystal substrates. Ho was selected as the substituting element for Y site because the ionic radius of Ho3+ is almost identical to that of Y3+ and as a result lattice distortion may not occur. It may be possible to generate some pinning effect as a result of random electron potential energies induced by the randomly occupied (Y,Ho) sites. Texture quality and current characteristics of the obtained films were analyzed with the intension of extending this work towards the cost effective coated-conductor fabrication.