Tailoring the vortex pinning strength of YBCO thin films by systematic incorporation of hybrid artificial pinning centers

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

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The effect of hybrid (columnar and spherical together) artificial pinning centers (APCs) on the vortex pinning properties of YBa2Cu3O7-δ(YBCO) 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 65 K and 77 K. Premixed YBCO + BaSnO3 composite targets are used for the deposition of the YBCO films which consist of self-assembled BaSnO3 nanocolumns (1D APCs); on the other hand, for the deposition of the YBCO films with hybrid APCs (BaSnO3 nanocolumns together with Y2O3 nanoparticles), the surface of the premixed YBCO + BaSnO3 composite targets are modified by putting a thin Y2O3 sectored piece on the premixed YBCO + BaSnO3 composite targets by means of silver paste. F pmax value increases systematically with incorporation of 1D and 1D and 3D APCs and it also shifts towards higher applied magnetic fields. Films with 1D APCs exhibit a strong J C peak at Θ = 0� (H//c-axis) whereas films consisting of hybrid APCs exhibit enhanced J C at all the investigated angular regimes. A possible mechanism of vortex pinning in samples with hybrid APCs is also discussed suggesting the role of 1D and 3D APCs.

Original languageEnglish
Article number114004
JournalSuperconductor Science and Technology
Volume28
Issue number11
DOIs
Publication statusPublished - 2015 Oct 7

Keywords

  • YBCO thin film
  • critical current
  • hybrid APCs
  • vortex pinning

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Tailoring the vortex pinning strength of YBCO thin films by systematic incorporation of hybrid artificial pinning centers'. Together they form a unique fingerprint.

  • Cite this