Theoritical Investigations On The Elastic Properties Of Bifeo3 Using Eos

TL;DR

This paper investigates the elastic properties of BiFeO3 under pressure using various equations of state, comparing theoretical predictions with experimental data to identify the most accurate models.

Contribution

It provides a comparative analysis of different EOS models for BiFeO3's elastic properties, highlighting the effectiveness of the B-M EOS.

Findings

B-M EOS yields results in good agreement with experimental data.

Elastic moduli increase with pressure, consistent with theoretical expectations.

Compressional and shear velocities match experimental observations.

Abstract

Different equations of state (EOS) have been used to study pressure as a function of volume compressions at a given temperature. The critical test of EOS' for solids under low compressions (<10GPa) by evaluating the pressure-volume derivative properties viz., isothermal bulk modulus and its pressure derivative calculated for BiFeO3. The elastic moduli such as bulk modulus, shear modulus, Young's modulus and Poisson's ratio have been calculated as a function of pressure. The values of elastic moduli have been obtained using compressional wave velocity and shear wave velocity. Both compressional and shear velocities and poisson's ratio are in accordance with available experimental data. It is found that B-M EOS gives satisfactory result which is in good agreement with the Stacey EOS.