Dynamical Magnetic Field Accompanying the Motion of Ferroelectric Domain Walls

Dominik M. Juraschek, Quintin N. Meier, Morgan Trassin, Susan E. Trolier-Mckinstry, Christian L. Degen, Nicola A. Spaldin

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

The recently proposed dynamical multiferroic effect describes the generation of magnetization from temporally varying electric polarization. Here, we show that the effect can lead to a magnetic field at moving ferroelectric domain walls, where the rearrangement of ions corresponds to a rotation of ferroelectric polarization in time. We develop an expression for the dynamical magnetic field, and calculate the relevant parameters for the example of 90° and 180° domain walls, as well as for polar skyrmions, in BaTiO3, using a combination of density functional theory and phenomenological modeling. We find that the magnetic field reaches the order of several μT at the center of the wall, and we propose two experiments to measure the effect with nitrogen-vacancy center magnetometry.

Original languageEnglish
Article number127601
JournalPhysical Review Letters
Volume123
Issue number12
DOIs
StatePublished - 17 Sep 2019
Externally publishedYes

Funding

FundersFunder number
National Science Foundation1410907
Horizon 2020 Framework Programme820394

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