Electromagnons in multiferroic YMn2O5 and TbMn2O5

A. B. Sushkov; R. Valdes Aguilar; S. Park; S-W. Cheong; H. D. Drew

doi:10.1103/PhysRevLett.98.027202

Electromagnons in multiferroic YMn2O5 and TbMn2O5

Strongly Correlated Electrons 2013-05-29 v2 Materials Science

Authors: A. B. Sushkov , R. Valdes Aguilar , S. Park , S-W. Cheong , H. D. Drew

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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 step-like 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.

Keywords

electromagnons multiferroics YMn2O5 TbMn2O5 magneto-dielectric effect far infrared spectroscopy

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@article{arxiv.cond-mat/0608707,
  title  = {Electromagnons in multiferroic YMn2O5 and TbMn2O5},
  author = {A. B. Sushkov and R. Valdes Aguilar and S. Park and S-W. Cheong and H. D. Drew},
  journal= {arXiv preprint arXiv:cond-mat/0608707},
  year   = {2013}
}

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4 pages, 4 figures, submitted

Electromagnons in multiferroic YMn2O5 and TbMn2O5

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