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Article Dans Une Revue Physical Review B Année : 2021

Evidence for an electromagnon in GdMn2O5 : A multiferroic with a large electric polarization

P Roy
  • Fonction : Auteur
J B Brubach
  • Fonction : Auteur
G Giri
E Rebolini
P Steffens
S Raymond
M B Lepetit
P Foury-Leylekian

Résumé

We report in this paper the dynamical properties of GdMn2O5 studied by inelastic neutron scattering and infrared spectroscopy assisted by ab initio calculations. Our work sheds light on the electromagnon, a magnetic mode that can be excited by an electric field. Combining spin-wave measurements, simulations, and ab initio calculations of the single-ion anisotropies and the superexchange interactions, we describe in detail the magnetic contribution to this mode. An exhaustive study of the temperature and polarization dependence of its electroactivity completes this comprehensive study of the complex GdMn2O5 system.
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Dates et versions

hal-03357175 , version 1 (28-09-2021)

Identifiants

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Quentin Berrod, A Vaunat, V Balédent, S Petit, P Roy, et al.. Evidence for an electromagnon in GdMn2O5 : A multiferroic with a large electric polarization. Physical Review B, 2021, 103 (17), pp.174434. ⟨10.1103/PhysRevB.103.174434⟩. ⟨hal-03357175⟩
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