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, J.-H. Chung, S. Park, S-W. Cheong, M. Mostovoy, and S.-H. Lee
Phys. Rev. Lett. 107, 097401 – Published 25 August 2011

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 [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.

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  • Received 25 August 2010

DOI:https://doi.org/10.1103/PhysRevLett.107.097401

© 2011 American Physical Society

Authors & Affiliations

J.-H. Kim1,2, M. A. van der Vegte3, A. Scaramucci3, S. Artyukhin3, J.-H. Chung4, S. Park5,6, S-W. Cheong5, M. Mostovoy3, and S.-H. Lee1,*

  • 1Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714, USA
  • 2Max-Planck-Institute for Solid State Research, Stuttgart, 70569, Germany
  • 3Zernike Institute for Advanced Materials, University of Groningen, AG Groningen, The Netherlands
  • 4Department of Physics, Korea University, Seoul 136-713, Korea
  • 5Rutgers Center for Emergent Materials and Department of Physics & Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
  • 6Department of Physics, Chung-Ang University, Seoul 156-756, Korea

  • *Email: shlee@virginia.edu

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Issue

Vol. 107, Iss. 9 — 26 August 2011

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