Intrinsic anharmonicity effect in YCrO3: Pressure and temperature dependent Raman spectra studies

Multiferroic oxide YCrO3 has attracted much interest in recent years due to its potential application as multifunctional materials. In present study, its structural stability and phonon modes have been investigated by Raman spectroscopy at temperatures from 100 to 600 K and under pressures up to 35.5 GPa. The successive evolution of Raman spectra indicates a good stability of this compound at high pressure and this temperature range. Thermodynamic Gruneisen parameters and intrinsic anharmonic parameters are calculated for each Raman active mode. The description of the line-broadening and the line-shift of the observed Raman lines are mainly based on the anharmonicity due to the phononephonon interaction, which are useful in modeling of thermodynamic entities. (C) 2019 Elsevier B.V. All rights reserved.