Spectral origin of the colossal magnetodielectric effect in multiferroic DyMn2O5

A. B. Sushkov; Ch. Kant; M. Schiebl; A. M. Shuvaev; Anna Pimenov; Andrei Pimenov; B. Lorenz; S. Park; S-W. Cheong; Maxim Mostovoy; H. D. Drew

doi:10.1103/PhysRevB.90.054417

Spectral origin of the colossal magnetodielectric effect in multiferroic DyMn2O5

Strongly Correlated Electrons 2014-10-24 v1

Authors: A. B. Sushkov , Ch. Kant , M. Schiebl , A. M. Shuvaev , Anna Pimenov , Andrei Pimenov , B. Lorenz , S. Park , S-W. Cheong , Maxim Mostovoy , H. D. Drew

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Abstract

The origin of the colossal magnetodielectric effect in DyMn2O5 [1] has been an outstanding question in multiferroics. Here, we report the activation of the electric dipole mode at 4-5 cm-1 in an applied magnetic field which fully accounts for the CMD effect. We examine two alternative explanations of this mode: an electromagnon and transitions between f-electron levels of Dy3+ ions. The experimental and theoretical evidence supports the electromagnon origin of the CMD effect.

Keywords

colossal magnetodielectric effect multiferroic DyMn2O5 electric dipole mode electromagnon f-electron transitions

Cite

@article{arxiv.1403.3717,
  title  = {Spectral origin of the colossal magnetodielectric effect in multiferroic DyMn2O5},
  author = {A. B. Sushkov and Ch. Kant and M. Schiebl and A. M. Shuvaev and Anna Pimenov and Andrei Pimenov and B. Lorenz and S. Park and S-W. Cheong and Maxim Mostovoy and H. D. Drew},
  journal= {arXiv preprint arXiv:1403.3717},
  year   = {2014}
}

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5 pages, 4 figures, submitted to PRL

Spectral origin of the colossal magnetodielectric effect in multiferroic DyMn2O5

Abstract

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