Elastic properties assessment in the multiferroic BiFeO3 by pump and probe method

Abstract

We have performed elasticity measurements in the bulk multiferroic BiFeO3 (BFO) using acoustical pump and probe spectroscopy. The sound velocities of the (quasi)-longitudinal and of the two (quasi)-transverse acoustic waves along three independent directions of the (110) surface have been measured. Moreover, one surface wave and one longitudinal wave propagating perpendicular to the surface have been detected. Based on initial input values of the six independent Cij elastic constants determined by our density functional theory calculations and our eleven experimental velocities, the numerical resolution of the acoustic equations allows to determine all the Cij elastic constants of BFO. The propagation direction dependence of volume and surface waves phase velocities allows the unambiguously assignment of the waves, hence the polarization of phonons.

References in corpus (8)

• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• First-principles study of spontaneous polarization in multiferroic BiFeO${}_3$
• Origin of magnetoelectric behavior in BiFeO${}_3$
• Room temperature coexistence of large electric polarization and magnetic order in BiFeO3 single crystals
• Light-induced size changes in BiFeO3 crystals
• Electric-field control of spin waves at room temperature in multiferroic BiFeO3
• Terahertz wave generation via optical rectification from multiferroic BiFeO3

Cited by in corpus (1)

• Elastic and magnetoelastic properties of TbMnO3 single crystal by nanosecond time resolved acoustics and first-principles calculations