Strong c-axis correlated pinning and hybrid pinning in YBa2Cu3O7-δ films containing BaHfO3 nanorods and stacking faults

Tomoya Horide, Koji Otsubo, Ryusuke Kita, Naoki Matsukida, Manabu Ishimaru, Satoshi Awaji, Kaname Matsumoto

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

High critical current density (Jc) was achieved in low temperatures of 40 and 20 K in YBa2Cu3O7-δ films containing elongated BaHfO3 nanorods and stacking faults, which were prepared using pulsed laser deposition and post-oxygen-annealing. The YBa2Cu3O7-δ + BaHfO3 film exhibited global pinning force maximum (Fp,max) of 312 GNm-3 at 40 K and 619 GNm-3 at 20 K due to strong pinning by nanorods. These Fp,max values are comparable to those in the previously-reported high-Jc films with almost the same matching field. Thus, the present study demonstrated that YBa2Cu3O7-δ superconducting matrix realized high Jc in low temperatures like other REBa2Cu3O7-δ (RE = Gd, Sm, (Gd, Y)). Furthermore, high Jc was obtained also for magnetic field parallel to the ab-plane, indicating hybrid pinning of nanorods and stacking faults. Thus, the stacking faults significantly affected the Jc properties in the YBa2Cu3O7-δ films containing nanorods.The present film structure with strong c-axis correlated pinning and hybrid pinning is effective in simultaneous control of Jc values and Jc anisotropy in YBa2Cu3O7-δ films.

Original languageEnglish
Article number074009
JournalSuperconductor Science and Technology
Volume30
Issue number7
DOIs
Publication statusPublished - 2017 Jun 12

Keywords

  • Film
  • Nanorod
  • Pinning
  • Stacking fault
  • YBCO

ASJC Scopus subject areas

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

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