MOD multi-layer YBCO films on single-crystal substrate

S. Ghalsasi, Y. X. Zhou, J. Chen, B. Lv, K. Salama

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Several practical applications require relatively thick Y 1Ba2Cu3O7 (YBCO) coated conductors (1-2 νm) to carry a high critical current (Ic). However, as the thickness of the YBCO film increases, its critical current density (J c) decreases. In this work, we report the successful fabrication of thick YBCO films using a multiple coatings technique while maintaining a high Jc. In particular, several YBCO films with different numbers of layers were fabricated on a LaAlO3 substrate by a multiple coatings process using a trifluoroacetate metal organic deposition method (TFA-MOD). No cracks or pores were observed in cross-sectional transmission electron microscope (TEM) images of these films; further, the layers were well connected with the smooth interface. The majority of the grains in the films were c-axis oriented. Full-width at half-maximum (FWHM) values for in-plane and out-of-plane alignments for a five-layer film were 2.45° and 1.2° respectively. Jc exceeding 1.6 MA cm-2 and critical current (I c) of 160 A cm-1 have been obtained for a 1 νm thick film with five layers at 77 K.

Original languageEnglish (US)
Article number045015
JournalSuperconductor Science and Technology
Volume21
Issue number4
DOIs
StatePublished - Apr 1 2008

ASJC Scopus subject areas

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

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