On the magnetoelastic and magnetoelectric couplings across the antiferromagnetic transition in multiferroic BiFeO3

Abstract

Clear anomalies in the lattice thermal expansion (deviation from linear variation) and elastic properties (softening of the sound velocity) at the antiferromagnetic-to-paramagnetic transition are observed in the prototypical multiferroic BiFeO3 using a combination of picosecond acoustic pump-probe and high-temperature X-ray diffraction experiments. Similar anomalies are also evidenced using first-principles calculations supporting our experimental findings. Those calculations in addition to a simple Landau-like model we also developed allow to understand the elastic softening and lattice change at T_N as a result of magnetostriction combined with electrostrictive and magnetoelectric couplings which renormalize the elastic constants of the high-temperature reference phase when the critical T_N temperature is reached.

References in corpus (15)

• Multiferroicity, The coupling between magnetic and polarization
• Electric-field control of spin waves at room temperature in multiferroic BiFeO3
• Phase diagram of Pb(Zr,Ti)O3 solid solutions from first principles
• Coherent magnetization precession in ferromagnetic (Ga,Mn)As induced by picosecond acoustic pulses
• Ultrafast Magneto-Acoustics in Nickel Films
• Magnetization switching by ultrashort acoustic pulses
• Surface acoustic wave driven ferromagnetic resonance in (Ga,Mn)(As,P) epilayers
• Multiple high-pressure phase transitions in BiFeO3
• Multiferroic phase transition near room temperature in BiFeO3 films
• Polar phonons and spin excitations coupling in multiferroic BiFeO3 crystals
• Negative magnetostrictive magnetoelectric coupling of BiFeO3
• Driving spin excitations by hydrostatic pressure in BiFeO3
• Anharmonic Phonons and Magnons in BiFeO3
• First-principles based Landau-Devonshire potential for BiFeO${}_3$
• Neutron inelastic scattering measurements of low energy phonons in the multiferroic BiFeO3

Cited by in corpus (6)

• Phonon anharmonicity: a pertinent review of recent progress and perspective
• Quantum-accurate magneto-elastic predictions with classical spin-lattice dynamics
• Spontaneous Anomalous Hall Effect in Two-Dimensional Altermagnets
• Ultrafast Light-driven Simultaneous Excitation of Coherent Terahertz Magnons and Phonons in Multiferroic BiFeO${}_3$
• Ultrafast light-induced shear strain probed by time-resolved X-ray diffraction: the model multiferroic BiFeO${}_3$ as a case study
• Superorders and acoustic modes folding in BiFeO${}_3$/LaFeO${}_3$ superlattices