Optical coupling to spin waves in the cycloidal multiferroic BiFeO3

Abstract

The magnon and optical phonon spectrum of an incommensurate multiferroic such as BiFeO3 is considered in the framework of a phenomenological Landau theory. The resulting spin wave spectrum is quite distinct from commensurate substances due to soft mode anisotropy and magnon zone folding. The former allows electrical control of spin wave propagation via reorientation of the spontaneous ferroelectric moment. The latter gives rise to multiple magneto-dielectric resonances due to the coupling of optical phonons at zero wavevector to magnons at integer multiples of the cycloid wavevector. These results show that the optical response of a multiferroic reveals much more about its magnetic excitations than previously anticipated on the basis of simpler models.

Final published version

References in corpus (11)

• Spin current and magneto-electric effect in non-collinear magnets
• Ferroelectricity in spiral magnets
• Possible evidence for electromagnons in multiferroic manganites
• Colossal Spin-Phonon Anomalies and the Ferroelectric Phase Transition in the Model Multiferroic Bifeo3
• Infrared and THz studies of polar phonons and improper magnetodielectric effect in multiferroic BFO3 ceramics
• Dynamical magneto-electric coupling in helical magnets
• Structural distortion and magnetism of BiFeO3 epitaxial thin films: a Raman spectroscopy and neutron diffraction study
• Electromagnons in multiferroic YMn2O5 and TbMn2O5
• Erratum: Landau Analysis of the Symmetry of the Magnetic Structure and Magnetoelectric Interaction in Multiferroics [Phys. Rev. B 76, 05447 (2007)]
• Multiferroicity induced by dislocated spin-density waves
• Nonanalytic Corrections to Fermi-Liquid Behavior in Helimagnets

Cited by in corpus (41)

• Electric-field control of spin waves at room temperature in multiferroic BiFeO3
• Observation of electromagnon excitations in the BiFe0${}_3$ spiral magnet
• Structure and spin dynamics of multiferroric BiFeO${}_3$
• Strain and Magnetic Field Induced Spin-Structure Transitions in Multiferroic BiFeO3
• Temperature-dependent properties of the magnetic order in single-crystal BiFeO3
• Magnetic dispersion and anisotropy in multiferroic BiFeO3
• Polar phonons and spin excitations coupling in multiferroic BiFeO3 crystals
• Electromagnons in multiferroic RMn2O5 compounds and their microscopic origin
• Magnetic and magnetoelectric excitations in TbMnO${}_3$
• Long wavelength magnetic and magnetoelectric excitations in the ferroelectric antiferromagnet BiFeO3
• Terahertz spectroscopy of spin waves in multiferroic BiFeO${}_3$ in high magnetic fields
• Temperature-Dependent Interplay of Dzyaloshinskii-Moriya Interaction and Single-Ion Anisotropy in Multiferroic BiFeO${}_3$
• The Spin State and Spectroscopic Modes of Multiferroic BiFeO3
• Evidence for two spin-glass transitions with magnetoelastic and magnetoelectric couplings in the multiferroic (Bi${}_{1-x}$Ba${}_x$)(Fe${}_{1-x}$Ti${}_x$)O${}_3$ system
• Dissipationless Multiferroic Magnonics
• Driving spin excitations by hydrostatic pressure in BiFeO3
• Curvilinear one-dimensional antiferromagnets
• Model for twin electromagnons and magnetically induced oscillatory polarization in multiferroic RMnO${}_3$
• Spin and lattice excitations of a BiFeO3 thin film and ceramics
• Theory of spin-orbit enhanced electric-field control of magnetism in multiferroic BiFeO3
• Field dependence of the Spin State and Spectroscopic Modes of Multiferroic BiFeO${}_3$
• Ultrafast Light-driven Simultaneous Excitation of Coherent Terahertz Magnons and Phonons in Multiferroic BiFeO${}_3$
• Spin-Induced Polarizations and Non-Reciprocal Directional Dichroism of Multiferroic BiFeO${}_3$
• Identifying the Magnetoelectric Modes of Multiferroic BiFeO${}_3$
• Magnetic excitations and optical transitions in the multiferroic spin-1/2 system LiCu${}_2$O${}_2$
• Mixed spin-1/2 and spin-1 Ising model with uniaxial and biaxial single-ion anisotropy on Bethe lattice
• Thermal evolution of the full three-dimensional magnetic excitations in the multiferroic BiFeO3
• Normal Modes of a Spin Cycloid or Helix
• Electromagnon excitations in modulated multiferroics
• Neutron inelastic scattering measurements of low energy phonons in the multiferroic BiFeO3
• Sinusoidal electromagnon in RMnO3: Indication of anomalous magnetoelectric coupling
• On the role of Lifshitz invariants in liquid crystals
• Spectral origin of the colossal magnetodielectric effect in multiferroic DyMn2O5
• Theory and phase-field simulations on electrical control of spin cycloids in a multiferroic
• Pinning, Rotation, and Metastability of BiFeO${}_3$ Cycloidal Domains in a Magnetic Field
• Selection rules and dynamic magnetoelectric effect of the spin waves in multiferroic BiFeO${}_3$
• Size-dependent bistability in multiferroic nanoparticles
• Ultrafast simultaneous manipulation of multiple ferroic orders through nonlinear phonon excitation
• Collective Phase-like Mode and the Role of Lattice Distortions at TN~TC in RMn2O5 (R= Pr, Sm, Gd, Tb, Bi)
• Tracking a hysteretic and disorder-broadened phase transition via the electromagnon response in improper ferroelectrics
• Sub-millimeter propagation of antiferromagnetic magnons via magnon-photon coupling