Strategic Research on Performance Optimization of YBa2Cu3O7 Coated Conductors

Conference · Tue Jan 01 00:00:00 EST 2008

OSTI ID:1021967

Aytug, Tolga ^[1]; Christen, David K ^[1]; Kim, Kyunghoon ^[1]; Lupini, Andrew R ^[1]; Paranthaman, Mariappan Parans ^[1]; Polat, Ozgur ^[1]; Thompson, James R ^[1]; Xiong, X. ^[2]; Selvamanickam, V. ^[2]; Meyer, III, Harry M ^[1]; Qiu, Xiaofeng ^[1]

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

Practical applications of second generation (2G) high temperature superconductor (HTS) wires require high critical current density, Jc, at high temperatures and magnetic fields. It has been well established that Jc can be increased via nanostructural engineering of artificial pinning centers within the HTS matrix. In the present work, composite LaMnO3:MgO (LMO:MgO) cap buffer layers with varying MgO contents 5 vol% up to 75 vol% have been grown on homo-epi MgO/IBAD(MgO) substrates to enhance the performance of YBa2Cu3O7-x (YBCO) films. Results showed formation of phase separated MgO nanocolumns within the LMO matrix. The impact of these nanocolumns on the superconducting properties of YBCO films deposited on the nanostructured layer was investigated by electrical transport measurements. Such YBCO films showed better in-field performance compared to that of YBCO films on standard LMO cap films. In particular, measurements of the field-angle dependence revealed c-axis correlated pinning for YBCO films on these composite cap layers. The present results demonstrate a practical approach to obtain high performance superconducting wires.

• 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: 1021967
• Resource Relation: Conference: Applied Superconductivity Conference, Washington, DC, USA, 20100801, 20100806
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
BUFFERS
COPPER OXIDES
CRITICAL CURRENT
DENSITY
FILMS
HIGH-TC SUPERCONDUCTORS
LAYERS
MAGNETIC FIELDS
MEETINGS
OPTIMIZATION
PERFORMANCE
SUBSTRATES
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
YTTRIUM OXIDES
Phase separation
buffer layers
critical current density
IBAD-MgO
PLD-YBCO