Sub-micron thin film intrinsic Josephson junctions

PA Warburton*, AR Kuzhakhmetov, C Bell, G Burnell, MG Blamire, H Wu, CRM Grovenor, H Schneidewind, Chris Bell

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

9 Citations (Scopus)

Abstract

We have fabricated sub-micron intrinsic Josephson junctions in thin films of Tl-Ba-Ca-Cu-O using two differing techniques suited to different applications. By using lateral focussed ion-beam milling we have created arrays of intrinsic junctions in c-axis oriented films. Such arrays, with areas as low as 0.25 mum(2), display large hysteresis comparable to that observed in single-crystal intrinsic junctions. By using normal focussed ion-beam milling we have created arrays in mis-aligned films grown on vicinal substrates. In arrays of area less than 0.4 mum(2) we observe Josephson phase diffusion and a suppressed critical current, showing that charging effects may be significant in these junctions.

Original languageEnglish
Pages (from-to)821-824
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume13
Issue number2
DOIs
Publication statusPublished - Jun 2003
EventApplied Superconductivity Conference - HOUSTON, United Kingdom
Duration: 4 Aug 20029 Aug 2002

Keywords

  • focussed ion-beam milling
  • Josephson junctions
  • nanofabrication
  • BI2SR2CACU2O8+DELTA
  • FABRICATION

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