Growth of YBCO thin films on TiN(0 0 1) and CeO2-coated TiN surfaces

Ilwon Kim, Paul N. Barnes*, Amit Goyal, Scott A. Barnett, Rand Biggers, Gregory Kozlowski, Chakrapani Varanasi, Iman Maartens, Rama Nekkanti, Tim Peterson, Tim Haugan, Sankar Sambasivan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Epitaxial growth of YBa2Cu3O7-x (YBCO) layers on TiN(0 0 1) surfaces was explored, both with and without CeO2 intermediate layers. The epitaxial TiN layers were grown on MgO(0 0 1) and textured Ni substrates. Thin CeO2 (∼200 nm thick) and YBCO (∼300 nm thick) layers were grown on TiN-coated MgO substrates, using pulsed laser deposition. While YBCO grown directly on TiN was of poor quality, a good epitaxial YBCO layer was obtained using a thin CeO2 cap layer on the TiN. A superconducting critical transition temperature (Tc) of 89 K was measured by AC susceptibility. The critical current density (Jc) was 6 × 105 A/cm2 obtained at 77 K by whole body transport current measurement in self-field using a 1 μV/cm criteria. These results suggest that transition metal nitrides, such as TiN, are potentially useful as buffer layers for YBCO thin films. Advantages of the nitride buffer layers compared to conventional oxide buffers include high electrical and thermal conductivity, better mechanical toughness, good diffusion barrier characteristics, and relative ease of deposition. Published by Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)227-234
Number of pages8
JournalPhysica C: Superconductivity and its applications
Volume377
Issue number3
DOIs
StatePublished - Sep 15 2002

Keywords

  • HTS coated conductors
  • Nitride buffer layers
  • TiN
  • YBaCuO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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