Possible observation of cycloidal electromagnons in BiFeO3.
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.
Cazayous
M
M
Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, 75205 Paris cedex 13, France. maximilien.cazayous@univ-paris-diderot.fr
Gallais
Y
Y
Sacuto
A
A
de Sousa
R
R
Lebeugle
D
D
Colson
D
D