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

doi:10.1016/j.scriptamat.2008.02.009

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 publication › Journal article › Academic research › peer-review

13 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 language	English
Pages (from-to)	1118-1120
Number of pages	3
Journal	Scripta Materialia
Volume	58
Issue number	12
DOIs	https://doi.org/10.1016/j.scriptamat.2008.02.009
Publication status	Published - 1 Jun 2008

Keywords

Ferroelectric properties
Ferromagnetic films
Heteroepitaxy
Strain

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

More information

10.1016/j.scriptamat.2008.02.009

Cite this

@article{24392b353b32467c998f721ea3f9b5f7,

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

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.",

keywords = "Ferroelectric properties, Ferromagnetic films, Heteroepitaxy, Strain",

author = "W. Huang and J. Zhu and Zeng, {H. Z.} and Wei, {X. H.} and Y. Zhang and Li, {Y. R.} and Jianhua Hao",

year = "2008",

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doi = "10.1016/j.scriptamat.2008.02.009",

language = "English",

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TY - JOUR

T1 - Effect of strain on the ferroelectric properties in epitaxial perovskite titanate thin films grown on ferromagnetic CoFe2O4layers

AU - Huang, W.

AU - Zhu, J.

AU - Zeng, H. Z.

AU - Wei, X. H.

AU - Zhang, Y.

AU - Li, Y. R.

AU - Hao, Jianhua

PY - 2008/6/1

Y1 - 2008/6/1

N2 - 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.

AB - 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.

KW - Ferroelectric properties

KW - Ferromagnetic films

KW - Heteroepitaxy

KW - Strain

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DO - 10.1016/j.scriptamat.2008.02.009

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SN - 1359-6462

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EP - 1120

JO - Scripta Materialia

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