Miniaturization of BaHfO3 nanoparticles in YBa2Cu3O y -coated conductors using a two-step heating process in the TFA-MOD method

H. Horita, R. Teranishi, Kazuhiro Yamada, K. Kaneko, Y. Sato, K. Otaguro, T. Nishiyama, T. Izumi, S. Awaji

Research output: Contribution to journalArticle

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Abstract

The critical current density (J c) of YBa2Cu3Oy (YBCO)-coated conductors in a magnetic field can be enhanced by the doping of flux-pinning centers in a metal organic deposition (MOD) process with trifluoroacetates (TFA). The size of these flux-pinning centers should be less than 10 nm to achieve commercial use due to the coherence length of YBCO at 77 K. In this paper, BaHfO3 (BHO) nanoparticles were introduced into YBCO films using the TFA-MOD method. Microstructures and the J c properties of the films prepared using a two-step heating process at crystallization were compared with film prepared using a conventional one-step heating process. The two-step heating process produced 15 nm average-sized BHO nanoparticles in the film compared to 19 nm nanoparticles in a film prepared using a one-step process. It was revealed that the size of nanoparticles in the films could be miniaturized by improving the heating processes in the MOD method, and the miniaturized nanoparticles could contribute to increased J c in magnetic fields. The mechanism of miniaturization is also discussed based on microstructure observations of quenched films.

Original languageEnglish
Article number025022
JournalSuperconductor Science and Technology
Volume30
Issue number2
DOIs
Publication statusPublished - Feb 2017

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Trifluoroacetic Acid
Industrial heating
miniaturization
conductors
Metals
Nanoparticles
nanoparticles
heating
metals
Flux pinning
flux pinning
Magnetic fields
microstructure
Microstructure
Crystallization
magnetic fields
critical current
Doping (additives)
crystallization
current density

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Miniaturization of BaHfO3 nanoparticles in YBa2Cu3O y -coated conductors using a two-step heating process in the TFA-MOD method. / Horita, H.; Teranishi, R.; Yamada, Kazuhiro; Kaneko, K.; Sato, Y.; Otaguro, K.; Nishiyama, T.; Izumi, T.; Awaji, S.

In: Superconductor Science and Technology, Vol. 30, No. 2, 025022, 02.2017.

Research output: Contribution to journalArticle

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