Effect of strain on the ferroelectric properties in epitaxial perovskite titanate thin films grown on ferromagnetic CoFe2O4layers

W. Huang, J. Zhu, H. Z. Zeng, X. H. Wei, Y. Zhang, Y. R. Li, Jianhua Hao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

A BaTiO3/CoFe2O4heterostructure was fabricated by laser molecular beam epitaxy. The effects of strain on the microstructures, domain morphologies and ferroelectric properties of BaTiO3thin films were studied systematically. Ferroelectric properties in a 40-nm-thick BaTiO3film were suppressed owing to a reduced tetragonality induced by the strain between BaTiO3and the underlying CoFe2O4. For a 100-nm-thick film, BaTiO3exhibits improved the ferroelectric properties with an out-of-plane polarization (2Pr) of 36.4 μC cm-2and an electric coercivity field of 104 kV cm-1. The results show that the thickness of BaTiO3can significantly affect the interfacial strain and hence the ferroelectric properties of the BaTiO3/CoFe2O4heterostructure.
Original languageEnglish
Pages (from-to)1118-1120
Number of pages3
JournalScripta Materialia
Volume58
Issue number12
DOIs
Publication statusPublished - 1 Jun 2008

Keywords

  • Ferroelectric properties
  • Ferromagnetic films
  • Heteroepitaxy
  • Strain

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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