Giant gigahertz optical activity in multiferroic ferroborate

Abstract

In contrast to well studied multiferroic manganites with a spiral structure, the electric polarization in multiferroic borates is induced within collinear antiferromagnetic structure and can easily be switched by small static fields. Because of specific symmetry conditions, static and dynamic properties in borates are directly connected, which leads to giant magnetoelectric and magnetodielectric effects. Here we prove experimentally that the giant magnetodielectric effect in samarium ferroborate SmFe3(BO3)4 is of intrinsic origin and is caused by an unusually large electromagnon situated in the microwave range. This electromagnon reveals strong optical activity exceeding 120 degrees of polarization rotation in a millimeter thick sample.

References in corpus (8)

• Electric-field control of spin waves at room temperature in multiferroic BiFeO3
• Dynamical magneto-electric coupling in helical magnets
• Origin of electromagnon excitations in \textit{R}MnO${}_3$
• Dynamics of Multiferroic Domain Wall in Spin-Cycloidal Ferroelectric DyMnO${}_3$
• Giant Magnetoelectric Effect in HoAl_3(BO_3)_4
• Magnetoelectric Effect and Spontaneous Polarization in HoFe${}_3$(BO${}_3$)${}_4$ and Ho${}_{0.5}$Nd${}_{0.5}$Fe${}_3$(BO${}_3$)${}_4$
• Electromagnons in multiferroic RMn2O5 compounds and their microscopic origin
• Electric field control of terahertz polarization in a multiferroic manganite with electromagnons

Cited by in corpus (9)

• High-temperature terahertz optical diode effect without magnetic order in polar FeZnMo${}_3$O${}_8$
• Unidirectional terahertz light absorption in the pyroelectric ferrimagnet CaBaCo4O7
• Switching of magnons by electric and magnetic fields in multiferroic borates
• Giant directional birefringence in multiferroic ferroborate
• Sign change of polarization rotation under either time or space inversion in magnetoelectric YbAl3(BO3)4
• Magnetic anisotropy and exchange paths for octa- and tetrahedrally coordinated Mn${}^{2+}$ ions in the honeycomb multiferroic Mn${}_2$Mo${}_3$O${}_8$
• Terahertz spectroscopy of crystal-field transitions in magnetoelectric TmAl3(BO3)4
• In-situ electric field control of THz non-reciprocal directional dichroism in the multiferroic Ba${}_2$CoGe${}_2$O${}_7$
• Terahertz optical activity near crystal field transitions of Tm3+ ions in magnetoelectric alumoborates