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)

Abstract

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
Volume33
Issue number10
DOIs
Publication statusPublished - 2020 Oct

Keywords

  • 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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