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Title: Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

Because of pressing global environmental challenges, focus has been placed on materials for efficient energy use, and this has triggered the search for nanostructural modification methods to improve performance. Achieving a high density of tunable-sized second-phase nanoparticles while ensuring the matrix remains intact is a long-sought goal. In this paper, we present an effective, scalable method to achieve this goal using metal organic deposition in a perovskite system REBa 2Cu 3O 7 (rare earth (RE)) that enhances the superconducting properties to surpass that of previous achievements. We present two industrially compatible routes to tune the nanoparticle size by controlling diffusion during the nanoparticle formation stage by selecting the second-phase material and modulating the precursor composition spatially. Combining these routes leads to an extremely high density (8 × 10 22 m -3) of small nanoparticles (7 nm) that increase critical currents and reduce detrimental effects of thermal fluctuations at all magnetic field strengths and temperatures. This method can be directly applied to other perovskite materials where nanoparticle addition is beneficial.
Authors:
 [1] ; ORCiD logo [2] ;  [3] ;  [3] ;  [4] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [8]
  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. Seikei Univ., Tokyo (Japan)
  4. Japan Fine Ceramics Center, Nagoya (Japan)
  5. National Institute of Advanced Industrial Science and Technology, Ibaraki (Japan)
  6. Tohoku Univ., Miyagi (Japan)
  7. Muroran Institute of Technology, Hokkaido (Japan)
  8. Kyushu Institute of Technology, Fukuoka (Japan)
Publication Date:
Report Number(s):
LA-UR-17-22261
Journal ID: ISSN 1884-4057; TRN: US1800139
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
NPG Asia Materials (Online)
Additional Journal Information:
Journal Name: NPG Asia Materials (Online); Journal Volume: 9; Journal Issue: 11; Journal ID: ISSN 1884-4057
Publisher:
Nature Publishing Group Asia
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Material Science
OSTI Identifier:
1410619