Ferroelectricity in the 1 $\mu$C cm${}^{-2}$ range induced by canted antiferromagnetism in (LaMn${}_3$)Mn${}_4$O${}_{12}$

Abstract

Pyroelectric current and magnetoelectric coupling measurements on polycrystalline samples of the quadruple perovskite (LaMn${}_3$)Mn${}_4$O${}_{12}$ give evidence of ferroelectricity driven by the antiferromagnetic ordering of the $B$-site Mn${}^{3+}$ ions at $T_{N,B}$=78 K with record values of remnant electric polarization up to $P$=0.56 $\mu$C cm${}^{-2}$. X-ray diffraction measurements indicates an anomalous behavior of the monoclinic $\beta$ angle at $T_{N,B}$, which suggests that $P$ lies in the $ac$-plane, where the moments are collinear, so we conclude that exchange striction is the mechanism of spin-driven ferroelectricity. Polarization values $\sim$3 $\mu$C cm${}^{-2}$ are expected in single crystals, which would open the avenue towards practical multiferroic applications.

arXiv comment5 pages, 5 figures

References in corpus (8)

• Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites
• Giant improper ferroelectricity in the ferroaxial magnet CaMn7O12
• Perovskite Manganites Hosting Versatile Multiferroic Phases with Symmetric and Antisymmetric Exchange Strictions
• Multiferroic Properties of CaMn${}_7$O${}_{12}$
• Giant Ferroelectric Polarization of CaMn7O12 Induced by a Combined Effect of Dzyaloshinskii-Moriya Interaction and Exchange Striction
• Femtoscale magnetically induced lattice distortions in multiferroic TbMnO3
• Modulated spin helicity stabilized by incommensurate orbital density waves in a quadruple perovskite manganite
• Internal-strain mediated coupling between polar Bi and magnetic Mn ions in the defect-free quadruple-perovskite BiMn${}_3$Mn${}_4$O${}_{12}$

Cited by in corpus (3)

• Pressure-induced structural phase transition and suppression of Jahn-Teller distortion in the quadruple perovskite structure
• Unconventional magnetic ferroelectricity in the quadruple perovskite NaMn${}_7$O${}_{12}$
• Correlation Effects on Magnetic Structure and Lattice Dynamics of LaMn${}_7$O${}_{12}$: A First-Principles Study