Magneto- to electroactive transmutation of spin waves in ErMnO3.
نویسندگان
چکیده
The low-energy dynamical properties of the multiferroic hexagonal perovskite ErMnO3 have been studied by inelastic neutron scattering as well as terahertz and far infrared spectroscopies on a synchrotron source. From these complementary techniques, we have determined the magnon and crystal field spectra and identified a zone center magnon excitable only by the electric field of an electromagnetic wave. Using a comparison with the isostructural YMnO3 compound and crystal field calculations, we propose that this dynamical magnetoelectric process is due to the hybridization of a magnon with an electroactive crystal field transition.
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عنوان ژورنال:
- Physical review letters
دوره 112 13 شماره
صفحات -
تاریخ انتشار 2014