Effect of the thickness of BiFeO{sub 3} layers on the magnetic and electric properties of BiFeO{sub 3}/La{sub 0.7}Sr{sub 0.3}MnO{sub 3} heterostructures

Journal Article · Mon Jun 17 04:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4811439· OSTI ID:22163041

Wang, Le; Wang, Zhen; Jin, Kui-juan; Li, Jian-qi; Yang, Huai-xin; Wang, Can; Zhao, Rui-qiang; Lu, Hui-bin; Guo, Hai-zhong; Yang, Guo-zhen ^[1]

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1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

BiFeO{sub 3} layers with various thicknesses were fabricated on La{sub 0.7}Sr{sub 0.3}MnO{sub 3} covered SrTiO{sub 3} substrates by a laser molecular-beam epitaxy system. The ferromagnetic transition temperature (T{sub c}) and magnetic coercive field (H{sub c}) of BiFeO{sub 3}/La{sub 0.7}Sr{sub 0.3}MnO{sub 3} heterostructures are larger than those of the La{sub 0.7}Sr{sub 0.3}MnO{sub 3} film. With increasing the thickness of the BiFeO{sub 3} layer, T{sub c}, H{sub c}, and ferroelectric coercive field of the BiFeO{sub 3}/La{sub 0.7}Sr{sub 0.3}MnO{sub 3} heterostructures decrease, while the dielectric permittivity, remanent polarization, and resistance ratio of the ON and OFF states increase. The variations of the magnetic and electric properties with the thickness could be due to the effects of the epitaxial strain and the interface layer.

• OSTI ID: 22163041
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 24 Vol. 102; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
COERCIVE FORCE
FERRITES
FERROELECTRIC MATERIALS
FILMS
INTERFACES
LANTHANUM COMPOUNDS
LASER RADIATION
LAYERS
MOLECULAR BEAM EPITAXY
PERMITTIVITY
POLARIZATION
STRAINS
STRONTIUM COMPOUNDS
STRONTIUM TITANATES
SUBSTRATES
THICKNESS
TRANSITION TEMPERATURE