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. A room temperature single-phase multiferroic with large and strongly coupled polarization and magnetization is a long-sought goal in multiferroics research. Here, the authors predict a promising candidate, layered-perovskite metal Bi5Mn5O17, which is a ferromagnet, ferroelectric, and ferrotoroid.

A three-order-parameter bistable magnetoelectric multiferroic metal / Urru, Andrea; Ricci, Francesco; Filippetti, Alessio; Íñiguez, Jorge; Fiorentini, Vincenzo. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 11:1(2020), pp. 1-7. [10.1038/s41467-020-18664-6]

A three-order-parameter bistable magnetoelectric multiferroic metal

Urru, Andrea;Ricci, Francesco;
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. A room temperature single-phase multiferroic with large and strongly coupled polarization and magnetization is a long-sought goal in multiferroics research. Here, the authors predict a promising candidate, layered-perovskite metal Bi5Mn5O17, which is a ferromagnet, ferroelectric, and ferrotoroid.
2020
11
1
1
7
4922
https://doi.org/10.1038/s41467-020-18664-6
https://arxiv.org/abs/2010.00349
Urru, Andrea; Ricci, Francesco; Filippetti, Alessio; Íñiguez, Jorge; Fiorentini, Vincenzo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/142971
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