Study of LaFeO3 perovskite material by high-pressure Raman scattering

摘要

We use high-pressure Raman-scattering spectroscopy to study LaFeO3 synthesized by using the sol-gel method.The structural evolution of the samples under high pressure and at room temperature is monitored via the Raman-scattering spectrum in the pressure range of 0.50 to 22.1 GPa.When the pressure surpasses 12 GPa,the Raman spectra change significantly around 180 cm~(-1),which indicates a structural phase transition.However,the Raman spectrum remains constant under 5.0 GPa,which indicates that the LaFeO3 structure is preserved at these pressures.