Broadband microwave measurements of overdoped Y0.9Ca 0.1Ba2Cu3O7-δ films using corbino geometry

E. Farber*, N. Bachar, D. Lavi, H. Castro, Y. J. Chen, Kaung-Hsiung Wu, Jenh-Yih Juang

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The surface impedance of Y0.9Ca0.1Ba 2Cu3O7-δ thin films was measured using the Corbino spectroscopy method. This special geometry, in which the sample dimensions are well defined by a ring pattern, is ideal for broadband high frequency reflection measurements. Using the complex reflected signal, S 11, measured by a vector network analyzer, one can find the surface impedance of the thin film, from which the complex conductivity can be deduced. In the current work we present the three-standard approach for calibration of the Corbino method and demonstrate the benefits of this approach in measuring superconducting Y0.9Ca0.1Ba2Cu 3O7-δ thin films up to 20 GHz and down to 6 K. For the data analysis the well-known generalized two-fluid model was implemented, taking into account a film thickness which is much smaller than the normal state skin depth and superconducting penetration depth.

Original languageEnglish
Pages (from-to)1111-1114
Number of pages4
JournalJournal of Superconductivity and Novel Magnetism
Volume26
Issue number4
DOIs
StatePublished - 1 Apr 2013

Keywords

  • Corbino
  • Microwave
  • Superconductor

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