Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers

Diego Lopez Gonzalez, Yasuhiro Shirahata, Ben Van de Wiele, Kevin J. A. Franke, Arianna Casiraghi, Tomoyasu Taniyama, Sebastiaan van Dijken*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We report on reversible electric-field-driven magnetic domain wall motion in a Cu/Ni multilayer on a ferroelectric BaTiO3 substrate. In our heterostructure, strain-coupling to ferroelastic domains with in-plane and perpendicular polarization in the BaTiO3 substrate causes the formation of domains with perpendicular and in-plane magnetic anisotropy, respectively, in the Cu/Ni multilayer. Walls that separate magnetic domains are elastically pinned onto ferroelectric domain walls. Using magneto-optical Kerr effect microscopy, we demonstrate that out-of-plane electric field pulses across the BaTiO3 substrate move the magnetic and ferroelectric domain walls in unison. Our experiments indicate an exponential increase of domainwall velocity with electric field strength and opposite domain wall motion for positive and negative field pulses. The application of a magnetic field does not affect the velocity of magnetic domain walls, but independently tailors their internal spin structure, causing a change in domain wall dynamics at high velocities. (C) 2017 Author(s).

Original languageEnglish
Article number035119
Pages (from-to)1-6
Number of pages6
JournalAIP ADVANCES
Volume7
Issue number3
DOIs
Publication statusPublished - Mar 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • MOTION
  • ANISOTROPY
  • NANOWIRES
  • VELOCITY

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Cite this

Gonzalez, D. L., Shirahata, Y., Van de Wiele, B., Franke, K. J. A., Casiraghi, A., Taniyama, T., & van Dijken, S. (2017). Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers. AIP ADVANCES, 7(3), 1-6. [035119]. https://doi.org/10.1063/1.4979267