Prospects and problems in fabrication of MgB2 Josephson junctions

Kenji Ueda*, Michio Naito

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We briefly survey recent developments in the thin film synthesis and junction fabrication of MgB2 toward superconducting electronics. The most serious problem in the thin film synthesis of MgB2 is the high vapor pressure required for phase stability. This problem makes insitu film growth difficult. However, there has been substantial progress in thin film technology for MgB2 in the past three years. The low-temperature thin-film process in a UHV chamber can produce high-quality MgB2 films with Tc ∼ 35 K. Furthermore, technology to produce single-crystal epitaxial MgB2 films has recently been developed by using hybrid physicalchemical vapor deposition. With regard to Josephson junctions, various types of junctions have been fabricated, all of which indicate that MgB2 has potential for superconducting devices that operate at 20-30 K, the temperature reached by current commercial crvocoolers.

Original languageEnglish
Pages (from-to)226-230
Number of pages5
JournalIEICE Transactions on Electronics
Issue number2
Publication statusPublished - 2005
Externally publishedYes


  • Josephson junctions
  • MgB
  • Superconducting electronics
  • Tunnel junctions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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