Magnetic order and electromagnon excitations in DyMnO3 studied by neutron scattering experiments

Abstract

Magnetic order and excitations in multiferroic DyMnO3 were studied by neutron scattering experiments using a single crystal prepared with enriched 162Dy isotope. The ordering of Mn moments exhibits pronounced hysteresis arising from the interplay between Mn and Dy magnetism which possesses a strong impact on the ferroelectric polarization. The magnon dispersion resembles that reported for TbMnO3. We identify the excitations at the magnetic zone center and near the zone boundary in the b direction, which can possess electromagnon character. The lowest frequency of the zone-center magnons is in good agreement with a signal in a recent optical measurement so that this mode can be identified as the electromagnon coupled by the same Dzyaloshinski-Moriya interaction as the static multiferroic phase.

References in corpus (30)

• Spin current and magneto-electric effect in non-collinear magnets
• Ferroelectricity in spiral magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3
• Possible evidence for electromagnons in multiferroic manganites
• Dynamical magneto-electric coupling in helical magnets
• Electromagnons in multiferroic YMn2O5 and TbMn2O5
• 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${}_7$
• Neutron diffraction study of TbMnO3: Magnetic structure revisited
• Chirality of Matter Shows Up via Spin Excitations
• Enhanced ferroelectric polarization by induced Dy spin-order in multiferroic DyMnO3
• Coupling of phonons and electromagnons in GdMnO_3
• 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
• Colossal magnon-phonon coupling in multiferroic Eu${}_{0.75}$Y${}_{0.25}$MnO${}_3$
• Magnetic and magnetoelectric excitations in TbMnO${}_3$
• Commensurate Dy magnetic ordering associated with incommensurate lattice distortion in orthorhombic DyMnO3
• Magnetic field induced flop of cycloidal spin order in multiferroic TbMnO3: The magnetic structure of the P||a phase
• Time-resolved imaging of magnetoelectric domain switching in multiferroic MnWO4
• Absence of commensurate ordering at the polarization flop transition in multiferroic DyMnO3
• Evidence of electro-active excitation of the spin cycloid in TbMnO3
• Electric field control of terahertz polarization in a multiferroic manganite with electromagnons
• Magneto-electric excitations in multiferroic TbMnO3 by Raman scattering
• Model for twin electromagnons and magnetically induced oscillatory polarization in multiferroic RMnO${}_3$
• Field dependence of magnetic correlations through the polarization flop transition in multiferroic TbMnO3 : evidence for a magnetic memory effect
• Kinetics of the Multiferroic Switching in MnWO${}_4$
• Electromagnon Resonances in the Optical Response of Spiral Magnets
• Sinusoidal electromagnon in RMnO3: Indication of anomalous magnetoelectric coupling
• Electromagnons in the multiferroic state of perovskite manganites with symmetric-exchange striction

Cited by in corpus (7)

• Multiferroic materials and magnetoelectric physics: symmetry, entanglement, excitation, and topology
• Strong magnetoelastic coupling at the transition from harmonic to anharmonic order in NaFe(WO${}_4$)${}_2$ with 3d${}^5$ configuration
• Spin-wave dispersion and magnon chirality in multiferroic TbMnO3
• Spin-Wave and Electromagnon Dispersions in Multiferroic MnWO4 as Observed by Neutron Spectroscopy: Isotropic Heisenberg Exchange versus Anisotropic Dzyaloshinskii-Moriya Interaction
• Multiple magnetic ordering phenomena in multiferroic o-HoMnO3
• Probing Dy3+ magnetic moments in multiferroic perovskite DyMnO3 by optical spectroscopy
• Room Temperature Dy Spin-Flop Switching in Strained DyFeO3 Thin Films