Studies on Characteristic of Infrared Spectra of Superconductor Bi-Sr-Ca-Cu-O System

Abstract

We made the superconductor of Bi₂Sr₂CaCu₂O_γ by the solid state reaction. According to the results of measurement by infrared spectrophotometer with the varying of wave number from 4000 to 400 cm^?1. We discovered three infrared absorption peaks at room temperature, i.e., peak A₁ at 500–550 cm^?1, peak A₂ at 800–840 cm^?1 and peak A₃ at 1370–1420 cm^?1. We find that peak A₁ is due to impure phase, peak A₂ is related with the crystal structure and peak A₃ is caused by the vibration of the atom layers of calcium.