hamon
Online ISSN : 1884-636X
Print ISSN : 1349-046X
ISSN-L : 1349-046X
Magnetic Excitation Mode in Multiferroics Ba2CoGe2O7
Minoru Soda
Author information
JOURNAL FREE ACCESS

2020 Volume 30 Issue 3 Pages 149-153

Details
Abstract

Magnetic excitation mode in the multiferroic Ba2CoGe2O7 are clarified by the unpolarized and polarized neutron scattering measurements. The unpolarized neutron spectrum reveals the existences of two dispersive excitations below 2.5 meV and one dispersionless excitation at 4 meV. By analyzing the polarized neutron spectra, the mode of the observed three excitations are identified. Three fluctuations, the transverse fluctuation in the a-b plane, that in the c-direction, and the longitudinal fluctuation of the ordered moment, are involved in the magnetic excitation of Ba2CoGe2O7. The determined modes are consistent with the calculation by the extended spin-wave theory. The longitudinal fluctuation takes on a main role in the electromagnon mode of Ba2CoGe2O7.

Content from these authors
© 2020 The Japanese Society for Neutron Science
Previous article Next article
feedback
Top