Analysis of Flux Pinning in YBa₂Cu₃O_7-δ Films by Nanoparticle-Modified Substrate Surfaces

Journal Article · Sun Jan 01 00:00:00 EST 2006 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.74.184505· OSTI ID:1003648

Aytug, Tolga ^[1]; Paranthaman, Mariappan Parans ^[1]; Leonard, Keith J ^[1]; Kang, Sukill ^[1]; Martin, Patrick M ^[1]; Heatherly, Jr, Lee ^[1]; Goyal, Amit ^[1]; Ijaduola, Anota O ^[1]; Thompson, James R ^[1]; Christen, David K ^[1]; Meng, R. ^[2]; Rusakova, I. ^[2]; Chu, C. W. ^[2]

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1. ORNL
2. University of Houston, Houston

Enhanced in-field critical current density Jc has been achieved in YBa2Cu3O7-o (YBCO) films grown on single crystal and biaxially textured metal substrate surfaces that were pretreated with second-phase nanoscale MgO and BaZrO3 particles. Nanoparticles were applied using wet chemical solution-based approaches. Results obtained in this study are compared with our previous investigations on surface modified substrates with sputter processed Ir nanoparticles. Cross-sectional TEM analysis and details of the field-orientation dependence of Jc are found to be similar for both sputtered and solution processed nanoparticle species. Present results show a more uniform dependence of Jc over all orientations of magnetic field, along with improved irreversibility behavior. Irrespective of the decoration technique, scaling behavior of the normalized volume pinning force density, Fp, demonstrates the similarity of pinning mechanisms for these YBCO films deposited on artificially modified substrates.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: OE USDOE - Office of Electric Transmission and Distribution
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1003648
• Journal Information: Physical Review B, Vol. 74, Issue 18; ISSN 1098--0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRITICAL CURRENT
MAGNETIC FIELDS
MAGNETIC FLUX
MONOCRYSTALS
SUBSTRATES