Spectral origin of the colossal magnetodielectric effect in multiferroic DyMn2 O5

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

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The origin of the colossal magnetodielectric (CMD) effect in DyMn2O5 [N. Hur, Phys. Rev. Lett. 93, 107207 (2004)PRLTAO0031-900710.1103/PhysRevLett.93. 107207] 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 an electromagnon origin of the CMD effect.

Original languageEnglish (US)
Article number054417
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number5
DOIs
StatePublished - Aug 20 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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