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Singh, K., Simon, C., Cannuccia, E., Lepetit, M.-B., Corraze, B., Janod, E. & Cario, L. (2014) Orbital-Ordering-Driven Multiferroicity and Magnetoelectric Coupling in GeV4S8. Phys. Rev. Lett. 113 137602.
Added by: Laurent Cournède (2016-03-10 21:01:55) |
| Type de référence: Article DOI: 10.1103/PhysRevLett.113.137602 Numéro d'identification (ISBN etc.): 0031-9007 Clé BibTeX: Singh2014 Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: avalanche breakdown, crystal, ferroelectricity, gata4se8, gav4s8, Mott insulators, polarization, superconductivity Créateurs: Cannuccia, Cario, Corraze, Janod, Lepetit, Simon, Singh Collection: Phys. Rev. Lett. |
Consultations : 1/585
Indice de consultation : 4% Indice de popularité : 1% |
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We report here the discovery of multiferroicity and large magnetoelectric coupling in the type I orbital order system GeV4S8. Our study demonstrates that this clustered compound displays a para-ferroelectric transition at 32 K. This transition originates from an orbital ordering which reorganizes the charge within the transition metal clusters. Below the antiferromagnetic transition at 17 K, the application of a magnetic field significantly affects the ferroelectric polarization, revealing thus a large magnetoelectric coupling. Our study suggests that the application of a magnetic field induces a metamagnetic transition which significantly affects the ferroelectric polarization thanks to an exchange striction phenomenon.
Added by: Laurent Cournède |