Flux pinning enhancements in YBa2Cu3O7-8 superconductors through phase separated, self-assembled LaMnO3-MgO nanocomposite films.

Journal Article · Sat Jan 01 00:00:00 EST 2011 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2010.2081333· OSTI ID:1016587

Polat, Ozgur ^[1]; Aytug, Tolga ^[1]; Paranthaman, Mariappan Parans ^[1]; Leonard, Keith J ^[1]; Pennycook, Stephen J ^[1]; Kim, Kyunghoon ^[1]; Cook, Sylvester W ^[1]; Thompson, James R ^[1]; Christen, David K ^[1]; Goyal, Amit ^[1]; Selvamanickam, V. ^[2]; Lupini, Andrew R ^[1]; Meyer, Hendrik ^[1]; Qiu, Xiaofeng ^[1]; Xiong, X. ^[2]

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

Technological applications of high temperature superconductors (HTS) require high critical current density, Jc, under operation at high magnetic field strengths. This requires effective flux pinning by introducing artificial defects through creative processing. In this work, we generated correlated disorder for strong vortex pinning in the YBa2Cu3O7- (YBCO) films by replacing the standard LaMnO3 (LMO) cap buffer layers in ion beam assisted deposited MgO templates with LMO:MgO composite films. Such films revealed formation of two phase-separated, but at the same time vertically aligned, self-assembled composite nanostructures that extend throughout the entire thickness of the film. Measurements of magnetic-field orientation-dependent Jc of YBCO coatings deposited on these nanostructured cap layers showed correlated c-axis pinning and improved in-field Jc performance compared to those of YBCO films deposited on standard LMO buffers. The present results demonstrate feasibility of novel and potentially practical approaches in the pursuit of more efficient, economical, and high performance superconducting devices.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: OE USDOE - Office of Electric Transmission and Distribution
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1016587
• Journal Information: IEEE Transactions on Applied Superconductivity, Vol. 21, Issue 3; ISSN 1051--8223
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
BUFFERS
COATINGS
CRITICAL CURRENT
DEFECTS
ION BEAMS
MAGNETIC FIELDS
MAGNETIC FLUX
NANOSTRUCTURES
PERFORMANCE
PROCESSING
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
THICKNESS