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A three-order-parameter bistable magnetoelectric multiferroic metal

Author

Listed:
  • Andrea Urru

    (Università di Cagliari, Cittadella Universitaria, Monserrato
    Scuola Superiore Internazionale di Studi Avanzati, Via Bonomea 265)

  • Francesco Ricci

    (Université Catholique de Louvain, Chemin des Étoiles 8)

  • Alessio Filippetti

    (Università di Cagliari, Cittadella Universitaria, Monserrato
    CNR-IOM, UOS Cagliari, Cittadella Universitaria, Monserrato)

  • Jorge Íñiguez

    (Luxembourg Institute of Science and Technology, 5 avenue des Hauts-Fourneaux
    University of Luxembourg, 41 Rue du Brill)

  • Vincenzo Fiorentini

    (Università di Cagliari, Cittadella Universitaria, Monserrato)

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.

Suggested Citation

  • Andrea Urru & Francesco Ricci & Alessio Filippetti & Jorge Íñiguez & Vincenzo Fiorentini, 2020. "A three-order-parameter bistable magnetoelectric multiferroic metal," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18664-6
    DOI: 10.1038/s41467-020-18664-6
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