Nb-based superconducting tunnel junctions with β-Ta trapping layers for photon detectors

Hiroaki Myoren, Yuki Kogure, Susumu Takada, Hiromi Sato, Chiko Otani, Hirohiko M. Shimizu, Keisuke Maehata

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

We have successfully fabricated Nb-based superconducting tunnel junctions (STJs) with β-Ta trapping layers. In an Nb/β-Ta stacked structure, β-Ta film showed the thickness dependence of critical temperature T c in current-voltage (I-V) characteristics due to the proximity effect from Nb films. We fabricated Nb-based STJs with β-Ta trapping layers for X-ray detector working at 0.4 K. We obtained an energy resolution of 52 eV for 5.9 keV X-ray irradiation at 0.4 K. We expect a high energy resolution by optimizing the thickness of β-Ta trapping layers and improving the fabrication process.

Original languageEnglish
Pages (from-to)1136-1138
Number of pages3
JournalIEEE Transactions on Applied Superconductivity
Volume13
Issue number2 I
Publication statusPublished - Jun 1 2003
Event2002 Applied Superconductivity Conference - Houston, TX, United States
Duration: Aug 4 2002Aug 9 2002

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Myoren, H., Kogure, Y., Takada, S., Sato, H., Otani, C., Shimizu, H. M., & Maehata, K. (2003). Nb-based superconducting tunnel junctions with β-Ta trapping layers for photon detectors. IEEE Transactions on Applied Superconductivity, 13(2 I), 1136-1138.