Dynamics of multiferroic domain wall in spin-cycloidal ferroelectric DyMnO3

F. Kagawa; M. Mochizuki; Y. Onose; H. Murakawa; Y. Kaneko; N. Furukawa; Y. Tokura

doi:10.1103/PhysRevLett.102.057604

Dynamics of multiferroic domain wall in spin-cycloidal ferroelectric DyMnO3

F. Kagawa^*, M. Mochizuki, Y. Onose, H. Murakawa, Y. Kaneko, N. Furukawa, Y. Tokura

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

105 Citations (Scopus)

Abstract

We report the dielectric dispersion of the giant magnetocapacitance (GMC) in multiferroic DyMnO3 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 an extremely high relaxation rate of ∼107s-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.

Original language	English
Article number	057604
Journal	Physical Review Letters
Volume	102
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.102.057604
Publication status	Published - 2009 Feb 2
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "We report the dielectric dispersion of the giant magnetocapacitance (GMC) in multiferroic DyMnO3 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 an extremely high relaxation rate of ∼107s-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.",

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AU - Kagawa, F.

AU - Mochizuki, M.

AU - Onose, Y.

AU - Murakawa, H.

AU - Kaneko, Y.

AU - Furukawa, N.

AU - Tokura, Y.

PY - 2009/2/2

Y1 - 2009/2/2

N2 - We report the dielectric dispersion of the giant magnetocapacitance (GMC) in multiferroic DyMnO3 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 an extremely high relaxation rate of ∼107s-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.

AB - We report the dielectric dispersion of the giant magnetocapacitance (GMC) in multiferroic DyMnO3 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 an extremely high relaxation rate of ∼107s-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.

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Dynamics of multiferroic domain wall in spin-cycloidal ferroelectric DyMnO3

Abstract

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