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Electromagnons in Multiferroic YMn2O5 and TbMn2O5

A. B. Sushkov, R. Valdés Aguilar, S. Park, S-W. Cheong, and H. D. Drew
Phys. Rev. Lett. 98, 027202 – Published 10 January 2007
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Abstract

Based on temperature dependent far infrared transmission spectra of YMn2O5 and TbMn2O5 single crystals, we report the observation of electric dipole-active magnetic excitations, or electromagnons, in these multiferroics. Electromagnons are found to be directly responsible for the steplike anomaly of the static dielectric constant at the commensurate—incommensurate magnetic transition and are the origin of the colossal magneto-dielectric effect reported in these multiferroics.

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  • Received 22 September 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.027202

©2007 American Physical Society

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Authors & Affiliations

A. B. Sushkov1, R. Valdés Aguilar1, S. Park2, S-W. Cheong2, and H. D. Drew1

  • 1Materials Research Science and Engineering Center, University of Maryland, College Park, Maryland 20742, USA
  • 2Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

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Issue

Vol. 98, Iss. 2 — 12 January 2007

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