Correlation between YBa{sub 2}Cu{sub 3}O{sub 7} nuclei density and the grain orientation of the CeO{sub 2} buffered Ni-W template of the second-generation superconducting wire.

Journal Article · Mon Jun 01 04:00:00 EDT 2009 · J. Appl. Phys.

DOI:https://doi.org/10.1063/1.3143043· OSTI ID:1001632

Solovyov, V F; Abraimov, D; Miller, D; Li, Q; Wiesmann, H; BNL,

The prime goal of the second-generation superconducting wire technology is to grow high-quality epitaxial layers of YBa{sub 2}Cu{sub 3}O{sub 7} (YBCO) superconductor using high-rate deposition on low-cost, kilometer-long substrates. We analyze the influence of Ni-W RABiTS{trademark} substrate grain misalignment on nucleation of epitaxial YBCO during metal-organic ex situ processing. Electron backscatter diffraction orientation maps are correlated with YBCO nuclei density obtained from scanning-electron microscopy. A critical Ni-W grain tilt misorientation angle of 8.5{sup o} was identified above which the YBCO nuclei density was observed to be extremely low, approaching zero. A proposed model explains the reduction in nuclei density as being due to the absence of (001) substrate terraces wide enough to accommodate the critical size for YBCO nuclei. This study emphasizes the strong effect of the out-of-plane tilt of substrate grains on superconducting properties of YBCO layers produced by metal-organic deposition.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1001632
• Report Number(s): ANL/MSD/JA-68814
• Journal Information: J. Appl. Phys., Journal Name: J. Appl. Phys. Journal Issue: Jun. 2009 Vol. 105; ISSN 0021-8979
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CRITICAL SIZE
DEPOSITION
DIFFRACTION
ELECTRONS
GRAIN ORIENTATION
MICROSCOPY
NUCLEATION
NUCLEI
ORIENTATION
PROCESSING
SUBSTRATES
SUPERCONDUCTING WIRES
SUPERCONDUCTORS