Isotropic enhancement in the critical current density of YBCO thin films incorporating nanoscale Y2BaCuO5 inclusions

Alok K. Jha, Kaname Matsumoto, Tomoya Horide, Shrikant Saini, Paolo Mele, Ataru Ichinose, Yutaka Yoshida, Satoshi Awaji

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The effect of incorporation of nanoscale Y2BaCuO5 (Y211) inclusions on the vortex pinning properties of YBa2Cu3O7-δ (YBCO or Y123) superconducting thin films is investigated in detail on the basis of variation of critical current density (JC) with applied magnetic field and also with the orientation of the applied magnetic field at two different temperatures: 77 K and 65 K. Surface modified target approach is employed to incorporate nanoscale Y211 inclusions into the superconducting YBCO matrix. The efficiency of Y211 nanoinclusions in reducing the angular anisotropy of critical current density is found to be significant. The observed angular dependence of the critical current density is discussed on the basis of mutually occupied volume by a vortex and spherical and/or planar defect. A dip in JC near the ab-plane is also observed which has been analyzed on the basis of variation of pinning potential corresponding to a spherical (3-D) or planar (2-D) pinning center and has been attributed to a reduced interaction volume of the vortices with a pinning center and competing nature of the potentials due to spherical and planar defects.

Original languageEnglish
Article number093905
JournalJournal of Applied Physics
Volume122
Issue number9
DOIs
Publication statusPublished - 2017 Sep 7
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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