Characterization of YBa2Cu3O7−δ coplanar resonator for microwave kinetic inductance detectors

Ariel Roitman, A. Shaulov, Y. Yeshurun

Research output: Contribution to journalArticlepeer-review


We demonstrate an improved YBa2Cu3O7−δ -based microwave kinetic inductance detector with a quality factor Q i ∼ 2.5 × 10 4 and noise equivalent power, ∼ 10 − 12 W Hz − 1 at 10 K. Zero field cooled (ZFC) and field cooled (FC) measurements of the magnetic field dependence of the resonance characteristics, show substantially different behavior, indicating that both the screening currents and vortices play a role. The ZFC measurements exhibit a sharp decrease of the resonance frequency, f r , and Q i at low fields, up to the full penetration field, revealing the dominant role of the screening currents. In contrast, the FC measurements exhibit a moderate decrease of f r and Q i with field, revealing the role of vortices and reflecting the field dependence of the penetration depth in a d-wave superconductor.

Original languageEnglish
Article number015002
JournalSuperconductor Science and Technology
Issue number1
StatePublished - Jan 2023


  • YBCO
  • high-temperature superconductors
  • magnetic field dependence
  • microwaves kinetic inductance detector (MKID)

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry
  • Electrical and Electronic Engineering


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