We present a Raman scattering and X-ray diffraction study of BaCuO2-δ subject to different heat treatments. A slight decrease in the volume of the unit cell was observed with increasing oxygen deficiency. The Raman spectrum of well oxygenated BaCuO2-δ consists of two main peaks at 580 and 634 cm-1 whose intensities changed dramatically with oxygen removal. It is found that a subsequent oxygen annealing recovered the original Raman feature of BaCuO2-δ. It is stressed that gret care is required in relating Raman modes of high-Tc YBa2Cu3O7-δ samples in the frequency range 550-650 cm-1 to oxygen disorder-induced Raman scattering.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering