Abstract
We report on the investigation of infrared reflectance spectroscopy on Bi 2Sr 2CaCu 2O 8 glass ceramics superconductor in the temperature range 20 K to 300 K and between the frequency of 100 to 20000cm −1. The frequency dependent conductivity was calculated by Kramer-Kronig transformation of the reflectance spectra. Analysis by Drude and lattice vibration models reveals the Drude plasma frequency and the reflectance edge, closer to those of a single crystal. All the predicted phonon modes are observed in the measured spectra. We did not find any appreciable change in the frequency and oscillator strength of the phonons in the present temperature range.
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