Spectral origin of the colossal magnetodielectric effect in multiferroic DyMn2O5

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.

arXiv comment5 pages, 4 figures, submitted to PRL

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Cited by in corpus (3)

• Multiferroic materials and magnetoelectric physics: symmetry, entanglement, excitation, and topology
• Magnetoelectric Phase Diagrams of Multiferroic GdMn2O5
• Magnetic and electric behaviors of DyMn${}_2$O${}_5$: effect of hole doping