Microwave surface impedance of a nearly ferroelectric superconductor

C. J. Wu, C. M. Fu, W. K. Kuo, T. J. Yang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The intrinsic microwave surface impedance for a nearly ferroelectric superconducting film of finite thickness in the dielectric-like response is theoretically investigated. It is based on the electrodynamics of a nearly ferroelectric superconductor that incorporates the Maxwell's equations, the lattice equations for an ionic lattice, and the superconducting London equation as well. It is found that the surface resistance will be enhanced with decreasing the film thickness when the thickness is less than the London penetration depth. However it will begin to resonate as a function of film thickness at the thickness being more than one London penetration depth. The anomalous resonance peaks occur when the thickness equals the even multiple of the London penetration depth. In the frequency-dependent surface resistance, the number of the resonance peaks is strongly dependent on the film thickness, increasing with increasing the thickness. In addition, these peaks are not regularly spaced at a fixed interval. Discussion on this anomaly in the surface resistance will be given.

Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalProgress in Electromagnetics Research
Volume73
DOIs
Publication statusPublished - 2007 May 14

Fingerprint

Surface resistance
Superconducting materials
Ferroelectric materials
Film thickness
Microwaves
impedance
microwaves
film thickness
penetration
Ferroelectric films
Superconducting films
Electrodynamics
Maxwell equations
superconducting films
electrodynamics
Maxwell equation
anomalies
intervals

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Microwave surface impedance of a nearly ferroelectric superconductor. / Wu, C. J.; Fu, C. M.; Kuo, W. K.; Yang, T. J.

In: Progress in Electromagnetics Research, Vol. 73, 14.05.2007, p. 39-47.

Research output: Contribution to journalArticle

Wu, C. J. ; Fu, C. M. ; Kuo, W. K. ; Yang, T. J. / Microwave surface impedance of a nearly ferroelectric superconductor. In: Progress in Electromagnetics Research. 2007 ; Vol. 73. pp. 39-47.
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