Strong Enhancement of Flux Pinning in YBa₂Cu₃O_7-δ Multilayers with Columnar Defects Comprised of Self-Assembled BaZrO₃

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Superconductor Science & Technology

DOI:https://doi.org/10.1088/0953-2048/20/1/003· OSTI ID:931336

Kang, Sukill ^[1]; Leonard, Keith J ^[1]; Martin, Patrick M ^[1]; Li, Jing ^[1]; Goyal, Amit ^[1]

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1. ORNL

Multilayer structures comprising YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) films with columns of self-assembled BaZrO{sub 3} (BZO) nanodots with interlayers of CeO{sub 2} or pure YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} were grown on rolling-assisted biaxially textured substrates (RABiTSs) using pulsed laser deposition. A significant enhancement of the critical current density (J{sub c}) was observed for the multilayers compared with a single layer of YBCO + BZO. J{sub c} varies as J{sub c}{approx}H{sup -{alpha}} with a of 0.27 for single layer of YBCO + BZO and 0.34 for both multilayered films. Enhancement of pinning in the multilayers is attributed to the presence of columnar defects comprised of self-assembled nanodots of BZO as well as planar CuO-type stacking defects arising as a result of interfacial reactions in the multilayers.

• 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: 931336
• Journal Information: Superconductor Science & Technology, Vol. 20
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
CRITICAL CURRENT
CRYSTAL DEFECTS
MAGNETIC FLUX
YTTRIUM OXIDES
BARIUM OXIDES
COPPER OXIDES
FILMS
QUANTUM DOTS
ZIRCONIUM OXIDES
CERIUM OXIDES
CURRENT DENSITY