Terahertz magnetoelectric response via electromagnons in magnetic oxides

Abstract

Terahertz magnetic resonance driven by the light electric field, now referred to as electromagnon, has stimulated interest due to its strong candidate for future spin-electronics. One unique characteristic of electromagnons is the terahertz magnetochromism, a color change by external magnetic field, as recently demonstrated in the hexaferrite. By taking perovskite manganites and hexaferrite as model cases, the current understating of the electromagnon activity is discussed in terms of the symmetric exchange mechanism.

18 pages including 4 figures, Short overview of electromagnon study, Comments are welcome

References in corpus (16)

• Spin current and magneto-electric effect in non-collinear magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Origin of electromagnon excitations in \textit{R}MnO${}_3$
• Giant directional dichroism of terahertz light in resonance with magnetic excitations of the multiferroic oxide BaCo${}_2$Ge${}_2$O${}_7$
• Electrically driven spin excitation in a ferroelectric magnet DyMnO_3
• Theory of electromagnon in the multiferroic Mn perovskites: Vital role of higher harmonic components of the spiral spin order
• Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites
• Theoretically predicted picosecond optical switching of spin chirality in multiferroics
• Theory of magnetoelectric resonance in two-dimensional $S=3/2$ antiferromagnet $\mathrm{B}{\mathrm{a}}_2\mathrm{CoG}{\mathrm{e}}_2{\mathrm{O}}_7$ via spin-dependent metal-ligand hybridization mechanism
• Electromagnons in the spin collinear state of a triangular lattice antiferromagnet
• Dynamical magnetoelectric effects in multiferroic oxides
• Model for twin electromagnons and magnetically induced oscillatory polarization in multiferroic RMnO${}_3$
• Gigantic terahertz magnetochromism via electromagnons in hexaferrite magnet Ba${}_2$Mg${}_2$Fe${}_{12}$O${}_{22}$
• Electric-dipole active two-magnon excitation in {\textit{ab}} spiral spin phase of a ferroelectric magnet Gd${}_{\text{0.7}}$Tb${}_{\text{0.3}}$MnO${}_{\text{3}}$
• Optical identification of hybrid magnetic and electric excitations in Dy3Fe5O12 garnet
• Theory of electric field induced one-magnon resonance in cycloidal spin magnets

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• Magnetoelectric susceptibility tensor of multiferroic TbMnO3 with cycloidal antiferromagnetic structure in external field
• Optical reflectivity and magnetoelectric effects on resonant plasmon modes in composite metal-multiferroic systems