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Title: Doubling the critical current density of high temperature superconducting coated conductors through proton irradiation

The in-field critical current of commercial YBa{sub 2}Cu{sub 3}O{sub 7} coated conductors can be substantially enhanced by post-fabrication irradiation with 4 MeV protons. Irradiation to a fluence of 8 × 10{sup 16} p/cm{sup 2} induces a near doubling of the critical current in fields of 6 T || c at a temperature of 27 K, a field and temperature range of interest for applications, such as rotating machinery. A mixed pinning landscape of preexisting precipitates and twin boundaries and small, finely dispersed irradiation induced defects may account for the improved vortex pinning in high magnetic fields. Our data indicate that there is significant head-room for further enhancements.
Authors:
; ; ; ; ;  [1] ; ; ; ; ;  [2] ;  [3] ; ;  [4]
  1. Materials Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439 (United States)
  2. American Superconductor Corp., 64 Jackson Road, Devens, Massachusetts 01434 (United States)
  3. Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008-5252 (United States)
  4. Los Alamos National Laboratory, MS-K764, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
22217959
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 12; Other Information: (c) 2013 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; 36 MATERIALS SCIENCE; BARIUM COMPOUNDS; CRITICAL CURRENT; CUPRATES; HEAD; HIGH-TC SUPERCONDUCTORS; IRRADIATION; MACHINERY; MAGNETIC FIELDS; MAGNETIC FLUX; MEV RANGE 01-10; PRECIPITATION; PROTONS; SUPERCONDUCTIVITY; TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS