Off-axis pulsed laser deposited YBa2Cu3O7-δ thin films for device applications

Kuen Lin Chen, Jau Han Chen, Hong Chang Yang, Herng Er Horng

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

YBa2Cu3O7-δ (YBCO) thin films deposited by off-axis pulsed laser deposition could be used for fabricating multilayer devices. Growing YBCO films with high critical current density and high Tc (Tc is around 90 K and Jc is above 107 A/cm2 at 77 K), there was a tendency that the surface morphology of YBCO films is rough. This causes problems in fabricating multilayer devices that require a smooth surface. In this work, we have developed two-step procedures of growing YBCO thin films with high critical current and a smooth surface for multilayer device applications. In the two-step procedure, we first grew YBCO film with higher Tc (Tc is around 90 K, but usually the surface is with defects like holes), next we planarized the film by growing the film with lower Tc (Tc is around 83 K and the surface is smooth). YBCO films deposited at low temperatures have critical current densities (Jc) around 106 A/cm2 at 77 K in zero magnetic field. These films are almost free from laser droplets and outgrowth-free surface. In two-step procedures, we could grow films with a smooth surface and high critical current density. Methods for growing smooth surfaces in two-step procedures will be presented.

Original languageEnglish
Pages (from-to)1078-1081
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume372-376
Issue numberPART 2
DOIs
Publication statusPublished - 2002 Aug 1

Keywords

  • Off-axis pulsed laser deposition
  • Surface roughness
  • YBCO thin films

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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