Study of LaFeO3 perovskite material by high-pressure Raman scattering

2nd International Conference on Current Progress in Functional Materials 2017

Triyono, D.^1 ; Laysandra, H.^1

Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Indonesia, Depok

16424, Indonesia^1

关键词: High pressure;    High pressure Raman;    LaFeO3;    Pressure ranges;    Raman scattering spectra;    Structural evolution;    Structural phase transition;    Structural transitions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/496/1/012045/pdf
DOI  :  10.1088/1757-899X/496/1/012045

来源: IOP

【 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.