Flux pinning properties in Y2BaCuO5-doped YBa2Cu3Oy films fabricated with vapor-liquid-solid growth method

Yuji Tsuchiya, Shuya Tajiri, Yusuke Ichino, Ataru Ichinose, Yutaka Yoshida

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

High-temperature superconducting REBa2Cu3Oy (RE: Rare earth elements, REBCO) films need both a high-speed film fabrication with a well-oriented crystalline texture and an introduction of artificial pinning centers (APCs) to improve critical current densities Jcs in magnetic fields. A vapor-liquid-solid (VLS) growth method enables the REBCO films to grow rapidly with a high quality but makes it difficult to introduce the APCs. In this study, Y2BaCuO5 (Y211) was doped into YBa2Cu3Oy (Y123) films fabricated via the VLS method with a liquid layer of Ba3Cu7O10. A microstructure analysis revealed that nano-particle APCs with diameter less than 10 nm were successfully introduced into the YBCO films. The Y211-doped Y123 films show the highest critical temperature Tc and the Jc in magnetic fields with a chemical composition ratio close to the stoichiometry of Y123.

Original languageEnglish
Pages (from-to)335-340
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume83
Issue number9
DOIs
Publication statusPublished - 2019

Keywords

  • Critical current density
  • Flux pinning
  • High temperature superconductors
  • Nano particle
  • Pulsed laser deposition method
  • Vapor-liquid-solid growth technique

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