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Title: Highly textured oxypnictide superconducting thin films on metal substrates

Highly textured NdFeAs(O,F) thin films have been grown on ion beam assisted deposition-MgO/Y{sub 2}O{sub 3}/Hastelloy substrates by molecular beam epitaxy. The oxypnictide coated conductors showed a superconducting transition temperature (T{sub c}) of 43 K with a self-field critical current density (J{sub c}) of 7.0×10{sup 4} A/cm{sup 2} at 5 K, more than 20 times higher than powder-in-tube processed SmFeAs(O,F) wires. Albeit higher T{sub c} as well as better crystalline quality than Co-doped BaFe{sub 2}As{sub 2} coated conductors, in-field J{sub c} of NdFeAs(O,F) was lower than that of Co-doped BaFe{sub 2}As{sub 2}. These results suggest that grain boundaries in oxypnictides reduce J{sub c} significantly compared to that in Co-doped BaFe{sub 2}As{sub 2} and, hence biaxial texture is necessary for high J{sub c.}.
Authors:
; ; ;  [1] ; ; ; ;  [2] ; ;  [3] ;  [4] ;  [5]
  1. Institute for Metallic Materials, IFW Dresden, D-01171 Dresden (Germany)
  2. Department of Crystalline Materials Science, Nagoya University, Chikusa, Nagoya 464-8603 (Japan)
  3. Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196 (Japan)
  4. iBeam Materials, Inc., 2778A Agua Fria Street, Santa Fe, New Mexico 87507 (United States)
  5. Institute for Technical Physics, Karlsruhe Institute of Technology, Hermann von Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen (Germany)
Publication Date:
OSTI Identifier:
22310664
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ARSENIC COMPOUNDS; BEAMS; CRITICAL CURRENT; CURRENT DENSITY; DEPOSITION; DOPED MATERIALS; GRAIN BOUNDARIES; IRON COMPOUNDS; MAGNESIUM OXIDES; METALS; MOLECULAR BEAM EPITAXY; NEODYMIUM COMPOUNDS; POWDERS; SUBSTRATES; TEXTURE; THIN FILMS; TRANSITION TEMPERATURE; YTTRIUM OXIDES