Ferroelectricity in the 1 $\mu$C cm$^{-2}$ range induced by canted antiferromagnetism in (LaMn$_{3}$)Mn$_{4}$O$_{12}

• Main Authors: Gauzzi, A, Milton, F, Gastaldo, V. Pascotto, Verseils, M, Gualdi, A, Dreifus, D, Klein, Y, Garcia, D, de Oliveira, A. J. A, Bordet, P, Gilioli, E
• Format: Journal Article
• Language: English
• Published: 17.11.2018
• Subjects: Physics - Materials Science
• DOI: 10.48550/arxiv.1811.07182

Appl. Phys. Lett. 115, 152902 (2019) 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.