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Magnetoelastic coupling in epitaxial cobalt ferrite/barium titanate heterostructures




Ultra-thin cobalt ferrite films have been synthesised on ferroelectric barium titanate crystals. The cobalt ferrite films exhibit a magnetic response to strain induced by structural changes in the barium titanate substrate, suggesting a pathway to multiferroic coupling. These structural changes are achieved by heating through the phase transition temperatures of barium titanate. In addition the ferromagnetic signal of the substrate itself is taken into account, addressing the influence of impurities or defects in the substrate. The cobalt ferrite/barium titanate heterostructure is a suitable oxidic platform for future magnetoelectric applications with an established ferroelectric substrate and widely tuneable magnetic properties by changing the transition metal in the ferrite film.

Author(s): Joachim Gräfe and Martin Welke and Francis Bern and Michael Ziese and Reinhard Denecke
Journal: Journal of Magnetism and Magnetic Materials
Volume: 339
Pages: 84-88
Year: 2013

Department(s): Modern Magnetic Systems
Bibtex Type: Article (article)
Paper Type: Journal

DOI: 10.1016/j.jmmm.2013.02.046


  title = {Magnetoelastic coupling in epitaxial cobalt ferrite/barium titanate heterostructures},
  author = {Gr{\"a}fe, Joachim and Welke, Martin and Bern, Francis and Ziese, Michael and Denecke, Reinhard},
  journal = {Journal of Magnetism and Magnetic Materials},
  volume = {339},
  pages = {84-88},
  year = {2013}