Pressure-induced structural changes of the tetragonal Bi2CuO4

The tetragonal compound Bi2CuO4 was investigated at high pressures by using in situ Raman scattering and X-ray diffraction (XRD) methods. A pressure-induced structural transition started at 20 GPa and completed at ∼37 GPa was found. The high pressure phase is in orthorhombic symmetry. Raman and XRD measurements revealed that the above phase transition is reversible.

Graphical abstractRaman spectrum evolution with pressure clearly indicates a pressure-induced structural transition occurred in Bi2CuO4 at pressures above 20 GPa.Figure optionsDownload full-size imageDownload as PowerPoint slide