Low-temperature growth and interface characterization of BiFeO3 thin films with reduced leakage current

Lee, Yi-Hsien; Wu, Jenn‐Ming; Chueh, Yu‐Lun; Chou, Li‐Wei

doi:10.1063/1.2112181

Cited by 153 publications

(106 citation statements)

References 25 publications

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“…It is possible to destroy the spin cycloid and hence to release the non-zero macroscopic M r and potential magnetoelectric effect. It has been demonstrated that A site substituted BFO multiferroics accompany their non-zero macroscopic M r with destroyed spin cycloids (Wang et al 2005(Wang et al , 2006Lee et al 2005;Eerenstein et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Effect of Y-doping on optical properties of multiferroics BiFeO3 nanoparticles

et al. 2012

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We have synthesized yttrium-doped bismuth ferrite nanoparticles through a modified Pechini technique. X-ray diffractometer, transmission electron microscope (TEM) and ultraviolet-visible spectrophotometer (UVVis) probes have been utilized to characterize the nanoparticles. Average particle size estimated from TEM found to be 29 nm for Bi 0.99 Y 0.01 FeO 3 samples. The band gap of the prepared BFO and BYFO nanoparticles varies from 1.97 to 2.29 eV, that is, within the visible range of the sunlight. This property of these nanoparticles can be utilized in photo catalytic decomposition of organic contaminants, such as Rhodamine-B (RhB) under visible light irradiation. We have explored and observed that RhB degrade up to 8 % while mixed with Bi 0.90 Y 0.1 FeO 3 for 1 h under 40 W lamp due to photo catalysis together with sensitization.

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Section: Introductionmentioning

confidence: 99%

Effect of Y-doping on optical properties of multiferroics BiFeO3 nanoparticles

et al. 2012

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“…Since then more studies have reported with successful development of BFO thin films with polarizations ranging from 50 to 150 m/cm 2 . 2, [8][9][10] Theoretical work has also been conducted to interpret the extraordinarily large ferroelectric polarization in BFO films. 11 The success in the thin film studies has in turn stimulated interest to produce bulk ceramics with improved properties.…”

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confidence: 99%

Processing and properties of Yb-doped BiFeO3 ceramics

Yan

Wang

Qu³

et al. 2007

Applied Physics Letters

111

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The authors prepared Yb-doped bismuth iron oxide ceramics ͑Bi 1−x Yb x FeO 3 , with 0 ഛ x ഛ 0.20͒ by rapid liquid phase sintering method and investigated the material's structures and electrical properties. The x-ray diffraction measurements showed that the doping of Yb has induced noticeable lattice distortion in the ceramics, and a largest distortion was observed when the concentration of Yb was 15%. By doping electrical resistivity, ferroelectric and dielectric properties of the ceramics were improved. Among all samples, BiFeO 3 doped with 15% Yb was found to have the smallest leakage current density ͑Ͻ10 −7 A/cm 2 ͒ and the largest remnant polarization ͑8.5 C/cm 2 ͒. The compound BiFeO 3 ͑abbreviated as BFO͒ was first synthesized in the late 1950s. 1 Research in the early stage, which mainly focused on ceramics, revealed that BFO possesses a rhombohedrally distorted perovskite structure ͑lat-tice parameters a = b = c = 0.563 nm and ␣ = ␤ = ␥ = 59.4°͒ in addition to coupled ferroelectric ͑Curie temperature T C ϳ 1103 K͒ and antiferromagnetic ͑Neel temperature T N ϳ 643 K͒ behaviors at room temperature. Despite a high Curie temperature, the bulk BFO exhibits very weak ferroelectric behavior ͑e.g., the spontaneous polarization P s , is only ϳ3.5 C/cm 2 ͒. 2-5 BFO thin films have been studied since the late 1980s. 6 In 2003, Wang et al. reported that a very large ferroelectric polarization ͑remnant polarization P r ϳ 60 C/cm 2 ͒ has been achieved in a BFO thin film epitaxially grown on SrRuO 3 / SrTiO 3 . 7 The significantly enhanced polarization was interpreted as the result of a compressive stress imposed by the SrRuO 3 electrode, which has an in-plane lattice parameter smaller than that of BFO. Because of the compressive stress, the epitaxial BFO film has a tetragonal-like crystal structure ͑a = 0.394 nm, c = 0.400 nm, and ␣ = 89.5°͒ rather than the rhombohedral symmetry in bulk materials and therefore leads to large polarization. Since then more studies have reported with successful development of BFO thin films with polarizations ranging from 50 to 150 m/cm 2 . 2,8-10 Theoretical work has also been conducted to interpret the extraordinarily large ferroelectric polarization in BFO films. 11 The success in the thin film studies has in turn stimulated interest to produce bulk ceramics with improved properties. New processing techniques, such as rapid liquid phase sintering, have been developed to synthesize single-phase BFO ceramics. 12,13 The effect of compositional modification, either by forming of solid solution ͑e.g., with Pb͑Zr 1−x ,Ti x ͒O 3 ͒ 14 or by doping, has also been extensively studied. Quite a number of transition metal elements ͑e.g., Ni, Ti, Cr, and Mn͒ 15-18 and rare-earth elements ͑e.g., La and Nd͒ 19,20 have been employed as dopants. The authors are more interested in the doping of rare-earth elements because this may significantly change both the ferroelectric properties and magnetic behaviors of BFO which could possibly lead to enhanced magnetoelectric effect. 21,22 In this work, we repo...

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“…In fact, the hybridization of Ti O orbitals supports the dislocation of the Ti 4+ ion in the (100) direction. In addition, hysteresis loop BFO slightly shift to the positive bias eld, which could be attributed to crystallographic defect distribution, and thermal history between top electrode and bottom electrodes [25].…”

Section: Resultsmentioning

confidence: 99%

Electrical, Surface Morphology and Magneto-Capacitance Properties of Pb Free Multiferroic (BiFeO₃)_1-x(BaTiO₃)_xSolid Solutions

et al. 2015

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The solid solutions (BiFeO3)1−x(BaTiO3)x (x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5) have been synthesized adopting a solid state sintering route. Well crystalline phase of (BiFeO3)1−x(BaTiO3)x ceramics at dierent level of x has been optimized at sintering temperature of 950• C for 2 h. Dielectric, polarization and magnetocapacitance properties were investigated for dierent content level of BaTiO3. Dielectric constant increased with increasing concentration of BaTiO3 up to x = 0.3 for all the frequencies of 10, 100, and 1000 kHz. Dielectric loss in the material is attributed to space charges, interfacial and dipolar polarizations. Measurements of P E loop indicated evident ferroelectricity in all samples. Well formed grain with varying grain sizes and nearly uniform shape was found for ceramics samples.

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Low-temperature growth and interface characterization of BiFeO3 thin films with reduced leakage current

Cited by 153 publications

References 25 publications

Effect of Y-doping on optical properties of multiferroics BiFeO3 nanoparticles

Effect of Y-doping on optical properties of multiferroics BiFeO3 nanoparticles

Processing and properties of Yb-doped BiFeO3 ceramics

Electrical, Surface Morphology and Magneto-Capacitance Properties of Pb Free Multiferroic (BiFeO₃)_1-x(BaTiO₃)_xSolid Solutions

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Low-temperature growth and interface characterization of BiFeO3 thin films with reduced leakage current

Cited by 153 publications

References 25 publications

Effect of Y-doping on optical properties of multiferroics BiFeO3 nanoparticles

Effect of Y-doping on optical properties of multiferroics BiFeO3 nanoparticles

Processing and properties of Yb-doped BiFeO3 ceramics

Electrical, Surface Morphology and Magneto-Capacitance Properties of Pb Free Multiferroic (BiFeO3)1-x(BaTiO3)xSolid Solutions

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Electrical, Surface Morphology and Magneto-Capacitance Properties of Pb Free Multiferroic (BiFeO₃)_1-x(BaTiO₃)_xSolid Solutions