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

doi:10.1109/TASC.2015.2396358

Irreversibility fields and critical current densities in strongly pinned YBa₂Cu₃O_7-x films with artificial pinning centers

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

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

We propose a microscopic approach to derive angular dependent critical current density J_c(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 J_c in YBa₂Cu₃O_7-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 J_c 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 language	English
Article number	7024153
Journal	IEEE Transactions on Applied Superconductivity
Volume	25
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2015.2396358
Publication status	Published - 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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AU - Jha, Alok K.

AU - Mele, Paolo

AU - Yoshida, Yutaka

AU - Awaji, Satoshi

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