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Title: Upward shift of the vortex solid phase in high-temperature-superconducting wires through high density nanoparticle addition

Here, we show a simple and effective way to improve the vortex irreversibility line up to very high magnetic fields (60T) by increasing the density of second phase BaZrO 3 nanoparticles. (Y 0.77,Gd 0.23)Ba 2Cu 3O y films were grown on metal substrates with different concentration of BaZrO 3 nanoparticles by the metal organic deposition method. We find that upon increase of the BaZrO 3 concentration, the nanoparticle size remains constant but the twin-boundary density increases. Up to the highest nanoparticle concentration (n ~ 1.3 × 10 22/m 3), the irreversibility field (H irr) continues to increase with no sign of saturation up to 60 T, although the vortices vastly outnumber pinning centers. We find extremely high H irr, namely H irr = 30 T (H||45°) and 24 T (H||c) at 65 K and 58 T (H||45°) and 45 T (H||c) at 50K. The difference in pinning landscape shifts the vortex solid-liquid transition upwards, increasing the vortex region useful for power applications, while keeping the upper critical field, critical temperature and electronic mass anisotropy unchanged.
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5] ;  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Seikei Univ., Tokyo (Japan)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Japan Fine Ceramics Center, Nagoya (Japan)
  4. Seikei Univ., Tokyo (Japan)
  5. International Superconductivity Technology Center, Kanagawa (Japan)
Publication Date:
Report Number(s):
Journal ID: ISSN 2045-2322; srep20436
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; superconductivity thin films irreversibly critical field; magnetic properties and materials; superconducting properties and materials
OSTI Identifier: