Josephson junction array for high-frequency current probe

K. Enpuku, S. Hijiya, A. Nakahodo

Research output: Contribution to journalArticlepeer-review


We propose the use of a high-Tc Josephson junction array for the measurement of high-frequency magnetic fields with high spatial resolution. In this application, the magnetic field B is converted to the voltage V by using the V-B relationship of the bicrystal junction. For the design of the array, the parameter dependence of the conversion efficiency dV/dB is examined both theoretically and experimentally. The eight-junction array fabricated with an area of 120 × 50 μm2 showed the conversion efficiency dV/dB = 70 and 260 V/T at T = 77 and 60 K, respectively. The value of dV/dB = 260 V/T indicates that the array is more sensitive, up to 7 GHz, than the conventional induction coil having the same area.

Original languageEnglish
Pages (from-to)256-259
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number1-4
Publication statusPublished - Feb 15 2002

All Science Journal Classification (ASJC) codes

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


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