Electromagnon in Y-type hexaferrite BaSrCoZnFe${}_{11}$AlO${}_{22}$

Abstract

We investigated static and dynamic magnetoelectric properties of single crystalline BaSrCoZnFe${}_{11}$AlO${}_{22}$ which is a room-temperature multiferroic with Y-type hexaferrite crystal structure. Below $300\mathrm{K}$, a purely electric-dipole-active electromagnon at $\approx 1.2\mathrm{THz}$ with the electric polarization oscillating along the hexagonal axis was observed by THz and Raman spectroscopies. We investigated the behavior of the electromagnon with applied DC magnetic field and linked its properties to static measurements of the magnetic structure. Our analytical calculations determined selection rules for electromagnons activated by the magnetostriction mechanism in various magnetic structures of Y-type hexaferrite. Comparison with our experiment supports that the electromagnon is indeed activated by the magnetostriction mechanism involving spin vibrations along the hexagonal axis.

References in corpus (13)

• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites
• Dynamical magneto-electric coupling in helical magnets
• Electrical control of large magnetization reversal in a helimagnet
• Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites
• Low magnetic field reversal of electric polarization in a Y-type hexaferrite
• Terahertz spectroscopy of spin waves in multiferroic BiFeO${}_3$ in high magnetic fields
• Driving spin excitations by hydrostatic pressure in BiFeO3
• Gigantic terahertz magnetochromism via electromagnons in hexaferrite magnet Ba${}_2$Mg${}_2$Fe${}_{12}$O${}_{22}$
• Spin and lattice excitations of a BiFeO3 thin film and ceramics
• Symmetry Analysis of Spin-Dependent Electric Dipole and Its Application to Magnetoelectric Effects
• Electromagnon in the Z-type hexaferrite $({\mathrm{Ba}}_x{\mathrm{Sr}}_{1-x}{)}_3\mathrm{C}{\mathrm{o}}_2\mathrm{F}{\mathrm{e}}_{24}{\mathrm{O}}_{41}$
• Magnetic fan structures in Ba${}_{0.5}$Sr${}_{1.5}$Zn${}_2$Fe${}_{12}$O${}_{22}$ hexaferrite revealed by resonant soft X-ray diffraction

Cited by in corpus (2)

• Non-equilibrium dynamics of spin-lattice coupling
• 4D visualization of the photoexcited coherent magnon by an X-ray free electron laser