A three-order-parameter bistable magnetoelectric multiferroic metal
Ricci F.Second
;Filippetti A.;Fiorentini V.
Last
2020-01-01
Abstract
Using first-principles calculations we predict that the layered-perovskite metal Bi5Mn5O17 is a ferromagnet, ferroelectric, and ferrotoroid which may realize the long sought-after goal of a room-temperature ferromagnetic single-phase multiferroic with large, strongly coupled, primary-order polarization and magnetization. Bi5Mn5O17 has two nearly energy-degenerate ground states with mutually orthogonal vector order parameters (polarization, magnetization, ferrotoroidicity), which can be rotated globally by switching between ground states. Giant cross-coupling magnetoelectric and magnetotoroidic effects, as well as optical non-reciprocity, are thus expected. Importantly, Bi5Mn5O17 should be thermodynamically stable in O-rich growth conditions, and hence experimentally accessible.File | Size | Format | |
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BiMO-NC.pdf open access
Description: articolo principale
Type: versione editoriale
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1.66 MB | Adobe PDF | View/Open |
BiMO-NC-Supp.pdf open access
Description: supplemental information
Type: versione editoriale
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218.09 kB | Adobe PDF | View/Open |
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