INFRARED TEMPERATURE-DEPENDENT STUDIES OF BI2SR2CACU2O8 GLASS-CERAMICSUPERCONDUCTORS

We report on the investigation of infrared reflectance spectroscopy on Bi2Sr2CaCu2O8 glass ceramics superconductor in the temperature range 20 K to 300 K and between the frequency of 100 to 20000 cm(-1). The fr equency dependent conductivity was calculated by Kramer-Kronig transfo rmation of the reflectance spectra. Analysis by Drude and lattice vibr ation models reveals the Drude plasma frequency and the reflectance ed ge, closer to those of a single crystal. All the predicted phonon mode s are observed in the measured spectra. We did not find any appreciabl e change in the frequency and. oscillator strength of the phonons in t he present temperature range.