Ferroelectric behavior in bismuth ferrite thin films of different thickness.

The ferroelectric behavior of BiFeO(3) thin films is modified by changing the film thicknesses, where the BiFeO(3) thin films with different thicknesses were grown on SrRuO(3)/Pt/TiO(2)/SiO(2)/Si(100) substrates by radio frequency sputtering. The mixture of (110) and (111) orientations is induced for all BiFeO(3) thin films regardless of their thicknesses, together with the columnar structure and the dense microstructure. Their dielectric behavior is almost independent of the film thickness where all thin films have a low dielectric loss. A giant remanent polarization of 2P(r) ≈ 156.6-188.8 μC/cm(2) is induced for the BiFeO(3) thin films in the thickness range of 190-600 nm. As a result, it is an effective way to improve the ferroelectric behavior of the BiFeO(3) thin film by tailoring the film thickness.

[1]  U. V. Waghmare,et al.  First-principles study of spontaneous polarization in multiferroic BiFeO 3 , 2005 .

[2]  Effect of epitaxial strain on ferroelectric polarization in multiferroic BiFeO3 films , 2007, 0710.5208.

[3]  M. Blamire,et al.  Greatly reduced leakage current and conduction mechanism in aliovalent-ion-doped BiFeO3 , 2005 .

[4]  M. Tonouchi,et al.  Influence of Mn Doping on Ferroelectric-Antiferromagnet BiFeO3 Thin Films Grown on (LaAlO3)0.3(Sr2AlTaO6)0.7 Substrates , 2006 .

[5]  R. Ramesh,et al.  Epitaxial BiFeO3 Multiferroic Thin Film Heterostructures , 2003, Science.

[6]  R. Ramesh,et al.  Multiferroics: progress and prospects in thin films. , 2007, Nature materials.

[7]  A. Shuvaev,et al.  Evidence for electroactive excitation of the spin cycloid in TbMnO3. , 2010, Physical Review Letters.

[8]  Y. Kitagawa,et al.  Low-field magnetoelectric effect at room temperature. , 2010, Nature materials.

[9]  Hiroshi Ishiwara,et al.  Microstructure and frequency dependent electrical properties of Mn-substituted BiFeO3 thin films , 2007 .

[10]  N. Mathur,et al.  Multiferroic and magnetoelectric materials , 2006, Nature.

[11]  John Wang,et al.  BiFeO3 thin films of (1 1 1)-orientation deposited on SrRuO3 buffered Pt/TiO2/SiO2/Si(1 0 0) substrates , 2010 .

[12]  K. Bouzehouane,et al.  Thickness-dependent structural and electrical properties of multiferroic Mn-doped BiFeO3 thin films grown epitaxially by pulsed laser deposition , 2008 .

[13]  Karin M. Rabe,et al.  FIRST-PRINCIPLES INVESTIGATION OF FERROMAGNETISM AND FERROELECTRICITY IN BISMUTH MANGANITE , 1999 .

[14]  L. Martin,et al.  Advances in the growth and characterization of magnetic, ferroelectric, and multiferroic oxide thin films , 2010 .

[15]  Yuanhua Lin,et al.  Thickness dependent size effect of BiFeO3 films grown on LaNiO3-buffered Si substrates , 2008 .

[16]  Junling Wang,et al.  Dramatically enhanced polarization in (001), (101), and (111) BiFeO3 thin films due to epitiaxial-induced transitions , 2004 .

[17]  John Wang,et al.  Improved ferroelectric behavior in (110) oriented BiFeO3 thin films , 2010 .

[18]  Chia-Ching Lee,et al.  Thickness-dependent retention behaviors and ferroelectric properties of BiFeO3 thin films on BaPbO3 electrodes , 2007 .

[19]  James F. Scott,et al.  Physics and Applications of Bismuth Ferrite , 2009 .

[20]  H. Fjellvåg,et al.  Theoretical investigation of magnetoelectric behavior in BiFeO3 , 2006 .

[21]  J. Zhai,et al.  Thickness dependence of strain and in-plane dielectric properties of highly (001) oriented (Ba,Sr)TiO3 thin films , 2010 .

[22]  H. Funakubo,et al.  Dependence of Ferroelectric Properties on Thickness of BiFeO3 Thin Films Fabricated by Chemical Solution Deposition , 2005 .

[23]  Junyong Wang,et al.  Temperature-dependent electrical behavior of La0.7Sr0.3MnO3-buffered Bi0.9La0.1FeO3 thin films , 2009 .

[24]  M. Ferenets,et al.  Thin Solid Films , 2010 .

[25]  John Wang,et al.  Ferromagnetic, ferroelectric, and fatigue behavior of (111)-oriented BiFeO3/(Bi1/2Na1/2)TiO3 lead-free bilayered thin films , 2009 .

[26]  Zi-kui Liu,et al.  Adsorption-controlled growth of BiMnO3 films by molecular-beam epitaxy , 2010 .

[27]  John Wang,et al.  Effects of SrRuO3 buffer layer thickness on multiferroic (Bi0.90La0.10)(Fe0.95Mn0.05)O3 thin films , 2009 .