Embedding of nanoparticles as flux pinning sites in superconducting samples

Research output: Contribution to journalArticle

Abstract

Crystallographic orientations of thin films and bulk, melt-textured YBa2Cu3Ox high-Tc superconductors with embedded Y2Ba4CuMOx (M = Nb, Zr, Ag) nanoparticles are studied by electron backscatter diffraction. The Y 2BaCuO5 particles exhibit no preferred orientation but have a strong negative influence on the matrix orientation. In contrast, the nanoparticles are not disturbing the texture of the YBCO matrix. For the bulk samples, depending on the preparation route, a different particle orientation with respect to the matrix is obtained. Untextured M-2411 nanoparticles are formed by solid state reaction during the melt process by adding oxides (Nb 2O5 or Y2O3) to the precursor powder. Pre-formed Y2Ba4CuMOx particles added to the precursor in the form of pre-reacted nanopowder, exhibit a dominant single orientation related to the surrounding YBCO matrix. In the case of thin films prepared using laser ablation with a bulk YBCO sample with embedded nanoparticles as a target, the nanoparticles are transferred into the thin film, but the transferred M-2411 particles are found to be randomly oriented. Nevertheless, these films exhibit increased flux pinning properties.

Original languageEnglish
Pages (from-to)4734-4737
Number of pages4
JournalThin Solid Films
Volume518
Issue number16
DOIs
Publication statusPublished - 2010 Jun 1

Keywords

  • EBSD
  • Orientation
  • Twins
  • YBCO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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