Irreversibility fields and critical current densities in strongly pinned YBa2Cu3O7-x films with artificial pinning centers

Kaname Matsumoto, Tomoya Horide, Alok K. Jha, Paolo Mele, Yutaka Yoshida, Satoshi Awaji

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We propose a microscopic approach to derive angular dependent critical current density Jc(θ) of YBCO films with c-axis correlated nanorods, based on the energy gain by pinning. Results are in good agreement with experimental ones. Irreversibility fields and Jc in YBa2Cu3O7-x thin films containing segmented BaSnO3 nanorods are systematically changed by selection of nanorod length and its spacing, and the variations are explained by the 'harmonic oscillator' approach based on the Bose glass state. Analysis of pinning energies and Jc indicates that stacked BSO nanorod segments in line behave as single columnar with a smaller diameter pin for Bc, in contrast, as nanoparticle pins for Bab.

Original languageEnglish
Article number7024153
JournalIEEE Transactions on Applied Superconductivity
Volume25
Issue number3
DOIs
Publication statusPublished - 2015 Jun 1

Keywords

  • YBCO
  • artificial pinning centers
  • critical current density
  • flux pinning
  • irreversibility field

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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