Lattice and spin dynamics in multiferroic BiFeO₃ and RMnO₃

Area of Science:

• Condensed Matter Physics
• Materials Science
• Solid State Chemistry

Background:

• Multiferroic materials, such as Bismuth Ferrite (BiFeO3) and Rare-Earth Manganites (RMnO3), exhibit simultaneous magnetic order and ferroelectricity.
• These materials are crucial for exploring fundamental physics and developing novel electronic devices due to the interplay between spin, lattice, and electric properties.

Purpose of the Study:

• To provide a comprehensive overview of bulk BiFeO3 and both orthorhombic and hexagonal RMnO3 (where R represents rare-earth elements and yttrium).
• To summarize the spin and lattice dynamics and their magnetoelectric coupling in these multiferroic systems.
• To discuss methods for controlling these characteristics under non-equilibrium conditions.

Main Methods:

• Review of experimental findings on multiferroic materials.
• Analysis of simulation data concerning spin-lattice dynamics and magnetoelectric coupling.
• Examination of techniques for manipulating multiferroic properties under non-equilibrium states.

Main Results:

• Detailed summary of the coexisting magnetic order and ferroelectricity in BiFeO3 and RMnO3.
• Elucidation of the intricate coupling between phonons (lattice dynamics) and magnons (spin dynamics).
• Identification of various experimental and simulation-based approaches to control these coupled phenomena.

Conclusions:

• BiFeO3 and RMnO3 are promising platforms for advanced physics and novel device applications.
• Understanding and controlling spin-lattice dynamics and magnetoelectric coupling are key to harnessing their potential.
• Non-equilibrium methods offer new avenues for tuning multiferroic properties.