Magnetic Excitations in the Low-Temperature Ferroelectric Phase of Multiferroic 
YMn2O5 Using Inelastic Neutron Scattering

Kim, J. H.; van der Vegte, M. A.; Scaramucci, A.; Artyukhin, S.; Chung, J. H.; Park, S.; Cheong, S. W.; Mostovoy, M.; Lee, S. H.

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Magnetic Excitations in the Low-Temperature Ferroelectric Phase of Multiferroic YMn₂O₅ Using Inelastic Neutron Scattering

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Kim, J. H.
Max Planck Society;

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Mostovoy, M.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Kim, J. H., van der Vegte, M. A., Scaramucci, A., Artyukhin, S., Chung, J. H., Park, S., et al. (2011). Magnetic Excitations in the Low-Temperature Ferroelectric Phase of Multiferroic YMn₂O₅ Using Inelastic Neutron Scattering. Physical Review Letters, 107(9): 097401.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C165-6

Abstract

We studied magnetic excitations in a low-temperature ferroelectric phase of the multiferroic YMn(2)O(5) using inelastic neutron scattering (INS). We identify low-energy magnon modes and establish a correspondence between the magnon peaks observed by INS and electromagnon peaks observed in optical absorption [A. B. Sushkov et al., Phys. Rev. Lett. 98, 027202 (2007).]. Furthermore, we explain the microscopic mechanism, which results in the lowest-energy electromagnon peak, by comparing the inelastic neutron spectral weight with the polarization in the commensurate ferroelectric phase.