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Multilayer buffer for high-temperature superconductor devices on MgO

  • M. I. Faley
  • , S. B. Mi
  • , A. Petraru
  • , C. L. Jia
  • , U. Poppe
  • , K. Urban
  • Jülich Research Centre

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

A multilayer thin film epitaxial passivation of single crystal MgO substrates was developed. YBa2Cu3O7-x films on the buffered MgO substrates demonstrate pure c-axis orientation, absence of in-plane disoriented grains, transition temperature Tc>91 K, and critical current density Jc ∼5 MA/cm2 at 77.4 K and were deposited in thicknesses of up to several micrometers without cracks. High-temperature superconductor multilayer flux transformers of 2 μm thickness on the buffered MgO substrates demonstrated improved insulation between the superconducting layers and an increased dynamic range compared to flux transformers on SrTiO3 substrates.

Original languageEnglish
Article number082507
JournalApplied Physics Letters
Volume89
Issue number8
DOIs
StatePublished - 2006
Externally publishedYes

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