YBCO/YCBCO multi-layer healing technique for YBCO coated conductors

Author

Meng, R.L. ; Baikalov, A. ; Pham, D. ; Rusakova, I.A. ; Sun, Y.Y. ; Cmaidalka, J. ; Wang, C. ; Iliev, M.N. ; Chu, C.W.

Author_Institution

Dept. of Phys., Univ. of Houston, TX, USA

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

3086

Lastpage

3089

Abstract

The influence of (Y_0.8Ca_0.2)Ba₂Cu₃O_y (YCBCO) over-layers on YBCO film properties has been studied on multi-layer YBCO/YCBCO films. The films were deposited on [001] MgO single-crystal substrates by pulsed-laser deposition. The results unambiguously demonstrate that a YCBCO over-layer can greatly improve the overall crystallinity of the YBCO films and thus their J_c. An optimal layer-number (n) of the multi-layer YBCO (n layers)/YCBCO (n-1 layers) has been identified to produce a maximum J_c enhancement. The observations suggest that the YBCO/YCBCO multi-layer healing technique (MLHT) mentioned above may be used for the fabrication of low cost, high performance YBCO coated conductors by relaxing the stringent and costly requirements for precise atomic alignment employed in previous fabrication methods.

Keywords

barium compounds; conductors (electric); critical current density (superconductivity); multilayers; pulsed laser deposition; superconducting thin films; ytterbium compounds; YBCO coated conductors; YBCO film properties; YBCO/YCBCO multilayers; YBa₂Cu₃O₇-(Y_0.8Ca_0.2)Ba₂Cu₃O_y; current density; film crystallinity; multilayer healing technique; pulsed-laser deposition; single-crystal substrates; superconducting materials; Conducting materials; Conductive films; Conductors; Costs; Crystal microstructure; Crystallization; Sun; Superconducting materials; Superconductivity; Yttrium barium copper oxide; Current density; superconducting materials; thin films;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.848964

Filename

1440322