Electric-Field Control of Propagating Spin Waves by Ferroelectric Domain-Wall Motion in a Multiferroic Heterostructure

Huajun Qin, Rouven Dreyer, Georg Woltersdorf, Tomoyasu Taniyama, Sebastiaan van Dijken

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Magnetoelectric coupling in multiferroic heterostructures offers a promising platform for electric-field control of magnonic devices based on low-power spin-wave transport. Here, electric-field manipulation of the amplitude and phase of propagating spin waves in a ferromagnetic Fe film on top of a ferroelectric BaTiO3 substrate is demonstrated experimentally. Electric-field effects in this composite material system are mediated by strain coupling between alternating ferroelectric stripe domains with in-plane and perpendicular polarization and fully correlated magnetic anisotropy domains with differing spin-wave transport properties. The propagation of spin waves across the strain-induced magnetic anisotropy domains of the Fe film is directly imaged and it is shown how reversible electric-field-driven motion of ferroelectric domain walls and pinned anisotropy boundaries turns the spin-wave signal on and off. Furthermore, linear electric-field tuning of the spin-wave phase by altering the width of strain-coupled stripe domains is demonstrated. The results provide a new route toward energy-efficient reconfigurable magnonics.

Original languageEnglish
Article number2100646
Number of pages9
JournalAdvanced Materials
DOIs
Publication statusE-pub ahead of print - 29 May 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • domain&#8208
  • wall motion
  • electic&#8208
  • field control of magnetism
  • magnetoelectric coupling
  • multiferroic heterostructures
  • reconfigurable magnonics
  • spin waves
  • MAGNETISM
  • RESONANCE
  • FILMS

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