Simultaneous achievement of high J cand suppressed J canisotropy by hybrid pinning in YBa2Cu3O7three-phase-nanocomposite film

Tomoya Horide, Kenta Torigoe, Manabu Ishimaru, Ryusuke Kita, Satoshi Awaji, Kaname Matsumoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Nanoscale pinning centers are introduced into YBa2Cu3O7 (YBCO) films and tapes to improve vortex pinning and critical current density (J c) for coated conductor application. While pinning with a single type of pinning center has been mainly investigated, hybrid pinning with multiple types of pinning center is expected to be more promising for simultaneously achieving high J c values and suppressing J c anisotropy. In the present study, a three-phase-nanocomposite film consisting of an YBCO matrix, BaHfO3 nanorods and Y-O nanoparticles was fabricated. A global pinning force maximum (F p,max, where F p = J c B) of 1.57 TN m-3 at 4.2 K, which is as high as the record level of F p,max, was achieved by the hybrid pinning of BaHfO3 nanorods and Y-O nanoparticles. Furthermore, the hybrid pinning improved the angular dependence of J c. The pinning contribution from nanoparticles increased with lowering temperature, which can explain the high J c at low temperature. Thus, the present study successfully demonstrates a highly effective structure that can simultaneously achieve suppressed J c anisotropy and a record level of J c.

Original languageEnglish
Article number105003
JournalSuperconductor Science and Technology
Issue number10
Publication statusPublished - 2020 Oct


  • Critical current density
  • Film
  • Nanorod
  • Vortex pinning
  • YBCO

ASJC Scopus subject areas

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

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