Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: K1.00205 : Non-polar electromagnon in hexa-YMnO$_{3}$
Author:
Coupled magnon-phonon excitations in magnetic materials have been
observed
in multiferroic materials and involve the polar optical phonons.
Such
excitations may be more general, occurring in non-ferroelectric
magnets and
involving non-polar (Raman or silent) phonons.
Temperature-dependent Raman
spectra of low-frequency excitations in single-crystal
h-YMnO$_{3}$ are
measured using a triple-grating spectrometer. We compare the
spectral
intensity of magnons to changes in the Raman-active phonons above
and below
the Neel temperature. Raman and infrared experimental results on
h-YMnO3
demonstrate that the 5 meV hybrid mode observed in neutron
scattering is an
example of a Raman electromagnon.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.205
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