Properties of YBCO on LaMnO3-capped IBAD MgO-templates without Homo-epitaxial MgO layer.

Journal Article · Thu Jan 01 04:00:00 EST 2009 · IEEE Transactions on Applied Superconductivity

OSTI ID:963681

Aytug, Tolga ^[1]; Paranthaman, Mariappan Parans ^[1]; Kim, Kyunghoon ^[1]; Zhang, Yifei ^[1]; Cantoni, Claudia ^[1]; Zuev, Yuri L ^[1]; Goyal, Amit ^[1]; Thompson, James R ^[1]; Christen, David K ^[1]

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1. ORNL

Previously, it has been well established that in an IBAD architecture for coated conductors, (1) LaMnO3 (LMO) buffer layers are structurally and chemically compatible with an underlying homo-epitaxial MgO layer and (2) high current density YBCO films can be grown on these LMO templates. In the present work, the homo-epi MgO layer has been successfully eliminated and a LMO cap layer was grown directly on the IBAD (MgO) template. The performance of the LMO/IBAD (MgO) samples has been qualified by depositing 1 m-thick YBCO coatings by pulsed laser deposition. Electrical transport measurements of YBCO films on the standard (with homo-epi MgO) and simplified (without homo-epi MgO) IBAD architectures were carried out. The angular dependencies of critical current density (Jc) are similar for both IBAD architectures. XRD measurements indicate good, c-axis aligned YBCO films. Transmission electron microscopy (TEM) images reveal that microstructures of YBCO/LMO/IBAD (MgO) and YBCO/LMO/homo-epi MgO/IBAD (MgO) templates are similar. These results demonstrate the strong potential of using LMO as a single cap layer directly on IBAD (MgO) for the development of a simplified IBAD architecture.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: OE USDOE - Office of Electric Transmission and Distribution
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 963681
• Journal Information: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 3 Vol. 19
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COATINGS
COPPER OXIDES
DEPOSITION
ELECTRICAL PROPERTIES
LANTHANUM OXIDES
MANGANESE OXIDES
PERFORMANCE
SUBSTRATES
YTTRIUM OXIDES