Giant Magnetoelectric Effect in a Multiferroic Material with a High Ferroelectric Transition Temperature

Abstract

We present a unique example of giant magnetoelectric effect in a conventional multiferroic HoMnO3, where polarization is very large (~56 mC/m2) and the ferroelectric transition temperature is higher than the magnetic ordering temperature by an order. We attribute the uniqueness of the giant magnetoelectric effect to the ferroelectricity induced entirely by the off-center displacement of rare earth ions with large magnetic moments. This finding suggests a new avenue to design multiferroics with large polarization and higher ferroelectric transition temperature as well as large magnetoelectric effects.

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• Hexagonal RMnO${}_3$: a model system for 2D triangular lattice antiferromagnets
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• Probing ultrafast spin dynamics in the antiferromagnetic multiferroic HoMnO${}_3$ through a magnon resonance
• Single crystal growth of the hexagonal manganites $R$MnO${}_3$ ($R$ = rare earth) by the optical floating-zone method
• Low-temperature heat transport and magnetic-structure transition of the hexagonal TmMnO_3 single crystals
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• Asymmetric splitting of an antiferromagnetic resonance via quartic exchange interactions in multiferroic hexagonal HoMnO${}_3$
• Enhancement of magnetodielectric coupling in 6H-perovskites Ba3RRu2O9 for heavier rare earth cations (R=Ho,Tb)
• Interplay between spin dynamics and crystal field in multiferroic compound HoMnO${}_3$
• Single-crystal neutron diffraction study of hexagonal YbMnO${}_3$ multiferroic under magnetic field
• Weak ferromagnetism and internal magnetoelectric effect in LiFeP${}_2$O${}_7$
• The role of the rare earth in the lattice and magnetic coupling in multiferroic h-HoMnO3
• Electrostatic potential mapping at ferroelectric domain walls by low-temperature photoemission electron microscopy
• Simple microscopic model for magneto-electric coupling in type-II antiferromagnetic multiferroics
• Unusual nanoscale coexistence of polar-nonpolar domains underlying oxygen storage properties in Ho(Mn, Ti)O${}_{3+\delta }$