Orbital degrees of freedom as origin of magnetoelectric coupling in magnetite (Articolo in rivista)

Type
Label
  • Orbital degrees of freedom as origin of magnetoelectric coupling in magnetite (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.85.085131 (literal)
Alternative label
  • Kunihiko Yamauchi1,2, and Silvia Picozzi1 (2012)
    Orbital degrees of freedom as origin of magnetoelectric coupling in magnetite
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Kunihiko Yamauchi1,2, and Silvia Picozzi1 (literal)
Pagina inizio
  • 85131/1 (literal)
Pagina fine
  • 85131/5 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://link.aps.org/doi/10.1103/PhysRevB.85.085131 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 85 (literal)
Rivista
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  • 5 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 8 (literal)
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  • 1Consiglio Nazionale delle Ricerche (CNR-SPIN), 67100 L'Aquila, Italy 2Institute of Scientific and Industrial Research (ISIR-SANKEN), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan (literal)
Titolo
  • Orbital degrees of freedom as origin of magnetoelectric coupling in magnetite (literal)
Abstract
  • A microscopic understanding of magnetoelectricity, i.e., the coupling between magnetic (electric) properties and external electric (magnetic) fields, is a crucial milestone for future generations of electrically controlled spintronic devices. Here, we focus on the first magnetoelectric known to mankind: magnetite. By means of density-functional simulations, we show that magnetoelectricity in charge-/orbital-ordered Fe3O4 in the noncentrosymmetric Cc structure is driven by the interplay between a peculiar orbital-order and on-site spin-orbit coupling. The excellent agreement with available experiments confirms our theoretical picture, pointing to magnetite as a peculiar magnetoelectric system where the electric polarization is induced by two origins, noncentrosymmetric-charge-ordering- and spin-orbit-coupling-induced anisotropic p-d hybridization. (literal)
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