Dynamics of Multiferroic Domain Wall in Spin-Cycloidal Ferroelectric DyMnO${}_3$

Abstract

We report the dielectric dispersion of the giant magnetocapacitance (GMC) in multiferroic DyMnO${}_3$ over a wide frequency range. The GMC is found to be attributable not to the softened electromagnon but to the electric-field-driven motion of multiferroic domain wall (DW). In contrast to conventional ferroelectric DWs, the present multiferroic DW motion holds extremely high relaxation rate of $\sim$$10^7$ s${}^{-1}$ even at low temperatures. This mobile nature as well as the model simulation suggests that the multiferroic DW is not atomically thin as in ferroelectrics but thick, reflecting its magnetic origin.

4 pages, 4 figures

References in corpus (5)

• Spin current and magneto-electric effect in non-collinear magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Fractal dimension and size scaling of domains in thin films of multiferroic BiFeO3
• Universality of the Scaling Law for Ferroic Domains
• Absence of commensurate ordering at the polarization flop transition in multiferroic DyMnO3

Cited by in corpus (2)

• Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites
• Relaxations as key to the magnetocapacitive effects in the perovskite manganites