Abstract

MgB 2 tunnel junctions (MgB 2/barrier/MgB 2) were fabricated using a native oxide grown on the bottom MgB 2 film as the tunnel barrier. Such barriers therefore survive the deposition of the second electrode at 300°C, even over junction areas of ∼1 mm 2. Studies of such junctions and those of the type MgB 2/native or thermal oxide/metal (Pb, Au, or Ag) show that tunnel barriers grown on MgB 2 exhibit a wide range of barrier heights and widths.

Original languageEnglish (US)
Article number042512
JournalApplied Physics Letters
Volume89
Issue number4
DOIs
StatePublished - Aug 7 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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