Ib. Vendik et al., THE PHENOMENOLOGICAL MODEL OF THE MICROWAVE SURFACE IMPEDANCE OF HIGH-TEMPERATURE SUPERCONDUCTING FILMS WITH MINIMIZED NUMBER OF FITTING PARAMETERS, Microwave and optical technology letters, 16(1), 1997, pp. 14-17
A correct phenomenological model of the microwave surface impedance of
a high-temperature superconducting (HTS) film with reduced number of
fitting parameters is presented. Simple empirical expressions are prop
osed for London penetration depth at T = 0 K and for the residual resi
stance parameter alpha versus the fitting parameter gamma considered a
s a figure of merit of the HTS film at microwaves. The model is verifi
ed by a comparison of results of modeling and measurement data in a wi
de temperature range. (C) 1997 John Wiley & Sons, Inc.