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APS » Journals » Phys. Rev. Lett. » Volume 101 » Issue 3
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Phys. Rev. Lett. 101, 037601 (2008) [4 pages]

Possible Observation of Cycloidal Electromagnons in BiFeO3

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M. Cazayous*, Y. Gallais, and A. Sacuto
Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, 75205 Paris cedex 13, France

R. de Sousa
Department of Physics and Astronomy, University of Victoria, Victoria, B.C., V8W 3P6, Canada

D. Lebeugle and D. Colson
Service de Physique de l’Etat Condensé, DSM/IRAMIS/SPEC, CEA Saclay, F-91191 Gif-sur-Yvette, France

Received 17 January 2008; published 17 July 2008

We unravel the magnon spectra of BiFeO3 by means of low-energy inelastic light scattering. We show the existence of two species of magnons corresponding to spin wave excitations in and out of the cycloidal plane. These excitations might be interpreted as electromagnon modes. The present observations present an unique opportunity to study the competition between ferroelectric and magnetic orders.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.037601
DOI:
10.1103/PhysRevLett.101.037601
PACS:
77.80.Bh, 75.25.+z, 75.50.Ee, 78.30.Hv

*maximilien.cazayous@univ-paris-diderot.fr

 
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