Magnetic excitations in the low-temperature ferroelectric phase of multiferroic YMn2O5 using inelastic neutron scattering

J. H. Kim, M. A. Van Der Vegte, A. Scaramucci, S. Artyukhin, Jaiho Chung, S. Park, S. W. Cheong, M. Mostovoy, S. H. Lee

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Abstract

We studied magnetic excitations in a low-temperature ferroelectric phase of the multiferroic YMn2O5 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. 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.

Original languageEnglish
Article number097401
JournalPhysical Review Letters
Volume107
Issue number9
DOIs
Publication statusPublished - 2011 Aug 25

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Kim, J. H., Van Der Vegte, M. A., Scaramucci, A., Artyukhin, S., Chung, J., Park, S., Cheong, S. W., Mostovoy, M., & Lee, S. H. (2011). Magnetic excitations in the low-temperature ferroelectric phase of multiferroic YMn2O5 using inelastic neutron scattering. Physical Review Letters, 107(9), [097401]. https://doi.org/10.1103/PhysRevLett.107.097401