Ferroelectricity in the 1 μC cm−2 range induced by canted antiferromagnetism in (LaMn3)Mn4O12
Abstract: Pyroelectric current and field-dependent specific heat measurements on polycrystalline samples of the quadruple perovskite (LaMn3)Mn4O12 give evidence of ferroelectricity driven by the canted antiferromagnetic ordering of the B-site Mn3+ ions at TN,B=78 KTN,B=78 K with record large remnant electric polarization up to 0.56 μC cm−2. X-ray diffraction measurements indicate an anomalous behavior of the monoclinic β angle at TN,BTN,B, which suggests that the polarization lies in the ac-plane, where the moments are collinear, and that symmetric exchange striction is the mechanism of spin-driven ferroelectricity. Polarization values up to ∼3–6 μC cm−2 are expected in single crystals or epitaxial films, which would enable the development of practical multiferroic applications.The authors acknowledge fruitful discussions with L. Chapon, M. Marezio, I. Mirebeau, and M. Mostovoy and financial support provided by the FAPESP Project Nos. 2012/21171-5, 2013/07296-2, 2013/27097-4 and 2017/24995-2, the CAPES-COFECUB Project No. Ph 878-17 (88887.130195/2017-01), and the Leonardo da Vinci program of the Université Franco-Italienne.
Author(s): A. Gauzzi, F. P. Milton,V. Pascotto Gastaldo, M. Verseils, A. J. Gualdi, D. von Dreifus, Y. Klein, D. Garcia, A. J. A. de Oliveira, P. Bordet & E. Gilioli.
Applied Physics Letters
Volume: 115 Published: OCT 7 2019
PDF: Ferroelectricity in the 1 μC cm−2 range induced by canted antiferromagnetism in (LaMn3)Mn4O12
DOI: 10.1063/1.5108640
