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  • Letter
  • Open Access

60∘ and 120∘ domain walls in epitaxial BaTiO3(111)/Co multiferroic heterostructures

Kévin J. A. Franke1, Colin Ophus2, Andreas K. Schmid2, and Christopher H. Marrows1,*

  • 1School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom
  • 2National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

  • *c.h.marrows@leeds.ac.uk
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Phys. Rev. B 107, L140407 – Published 19 April, 2023

DOI: https://doi.org/10.1103/PhysRevB.107.L140407

Abstract

We report on domain pattern transfer from a ferroelectric BaTiO3 substrate with a (111) orientation of the surface to an epitaxial Co film grown on a Pd buffer layer. Spatially modulated interfacial strain transfer from ferroelectric/ferroelastic domains and inverse magnetostriction in the ferromagnetic film induce stripe regions with a modulation of the in-plane uniaxial magnetic anisotropy direction. Using spin-polarized low-energy electron microscopy, we observe the formation of two distinct anisotropy configurations between stripe regions, leading to angles of 60∘ or 120∘ between the magnetizations of adjacent domains. Moreover, through application of a magnetic field parallel or perpendicular to these stripes, head-to-head or head-to-tail magnetization configurations are initialized. This results in four distinct magnetic domain-wall types associated with different energies and domain widths, which, in turn, affects whether domain pattern transfer can be achieved.

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References (39)

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Outline

Information

Phys. Rev. B 107, L140407– Published 19 April, 2023
  • Received 11 November 2021
  • Revised 9 December 2022
  • Accepted 31 March 2023
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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