Enhanced critical current density of YBa2Cu3O x films grown on Nd1/3Eu1/3Gd 1/3Ba2Cu3Ox with nano-undulated surface morphology

R. L. Meng, T. H. Johansen, I. A. Rusakova, A. Baikalov, D. Pham, F. Chen, Z. Y. Zuo, C. W. Chu

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1 Citation (Scopus)

Abstract

We report a simple and easily controllable method where a nano-undulated surface morphology of superconducting Nd1/3Eu1/3Gd 1/3Ba2Cu3Ox (NEG) films leads to a substantial increase in the critical current density in superconducting YBa 2Cu3Ox (YBCO) films deposited by pulsed laser deposition on such NEG layers. The enhancement is observed over a wide range of fields and temperatures. Transmission electron microscopy shows that such YBCO films possess a high density of localized areas, typically 20 × 20 nm 2 in size, where distortion of atomic planes give rotational (2-5°) moiré patterns. Their distribution is random and uniform, and expected to be the origin of the enhanced flux pinning. Magneto-optical imaging shows that these films have excellent macroscopic magnetic uniformity.

Original languageEnglish
Pages (from-to)39-44
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume434
Issue number1
DOIs
Publication statusPublished - 2006 Feb 1

All Science Journal Classification (ASJC) codes

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

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