Formation of Self-Assembled Ba₂YNbO₆ Nanocolumns and their Contribution to Flux-Pinning and J_c in Nb-doped YBa₂Cu₃O_7- Films

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Applied Physics Express

DOI:https://doi.org/10.1143/APEX.3.023101· OSTI ID:985280

Wee, Sung Hun ^[1]; Goyal, Amit ^[1]; Zuev, Yuri L ^[1]; Cantoni, Claudia ^[1]; Selvamanickam, V. ^[2]; Specht, Eliot D ^[1]

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1. ORNL
2. SuperPower Incorporated, Schenectady, New York

Ba{sub 2}RENbO{sub 6} (RE = rare earth elements including Y) compounds are considered new additives for superior flux-pinning in YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) films due to their excellent chemical inertness to and large lattice mismatches with YBCO. Simultaneous laser ablation of a YBCO target and a Nb metal foil attached to the surface of the target resulted in epitaxial growth of YBCO films having columnar defects comprised of self-aligned Ba{sub 2}YNbO{sub 6} (BYNO) nanorods parallel to the c-axis of the film. Compared to pure YBCO, YBCO+BYNO films exhibited no T{sub c} reduction as well as superior J{sub c} performance with higher self- and in-field J{sub c} by a factor of 1.5-7 and also exhibited a strong J{sub c} peak for H {parallel} c indicative of strong c-axis correlated flux-pinning.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: OE USDOE - Office of Electric Transmission and Distribution
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 985280
• Journal Information: Applied Physics Express, Journal Name: Applied Physics Express Journal Issue: 2 Vol. 3; ISSN 1882-0778; ISSN 1882-0786
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABLATION
ADDITIVES
DEFECTS
LASERS
MAGNETIC FLUX
PERFORMANCE
RARE EARTHS
TARGETS