Eur. Phys. J. B 25, 423-429 (2002)
https://doi.org/10.1140/epjb/e20020048

Polarized infrared reflectivity study of an oriented ceramic of Bi₂Sr₂Ca₂Cu₃O_10+δ (Bi-2223)

¹ Laboratory of electrodynamics of advanced materials, LRC M01 associated to CEA, FRE 2077 associated to CNRS, François Rabelais University, 37200 Tours, France
² CRISMAT (UMR CNRS 6508) , ISMRA, boulevard Maréchal Juin, 14050 Caen, France

Corresponding author: ^a gervais@delphi.phys.univ-tours.fr

Received: 26 April 2001
Revised: 28 August 2001
Published online: 15 February 2002

Abstract

The reflectivity spectra of an oriented ceramic of Bi-2223 has been investigated by polarized infrared reflectivity spectroscopy in the energy range 0.005–2.2 eV. It is shown that the data for the polarization parallel to the c axis cannot be fitted with a one-component Drude or extended-Drude model. The conductivity spectrum is then obtained from the best fit of a “double-damping Drude” model to reflectivity spectra, itself derived from the factorized form of the dielectric function, and by a Kramers-Kronig inversion as well. The data and their analysis give a new insight of the 2D character of the system.