Crystal structure and ferroelectricity of nanocrystalline barium titanate thin films

Wang, Moo–Chin; Hsiao, Fu-Yuen; Hsi, Chi‐Shiung; Wu, Nan-Chung

doi:10.1016/s0022-0248(02)01694-9

Cited by 48 publications

(22 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…BaTiO 3 might have caused early solidification, due to its higher heat transfer coefficient than that of PP (He 2004;Weidenfeller et al 2004). Diffraction peaks in the range of 30-60 mainly correspond to perovskite barium titanate crystals (Wang et al 2002;Yuh et al 2005 ELCAPBTPP 671 structure was much less. Improved crystallinity should have been effective on charge stability of the webs, which was seen on filtration tests upon isothermal potential decay test.…”

Section: Microstructural Properties Of Batio 3 /Pp Websmentioning

confidence: 99%

Electrostatic Capture Efficiency Enhancement of Polypropylene Electret Filters with Barium Titanate

Kılıç

Shim

Pourdeyhimi

2015

Aerosol Science and Technology

View full text Add to dashboard Cite

This study reports on the effects of BaTiO 3 -a high dielectric constant additive-addition on charging and filtration properties of meltblown polypropylene (PP) electret filters. Since electrostatic capture efficiency of electret filters is mainly dependent on electrical forces, surface potential and aerosol filtration properties were analyzed and compared. Due to quasipermanent nature of electret property, stability of charging and filtration performance was also investigated via following an isothermal charge decay procedure. Addition of BaTiO 3 did not alter fiber morphology significantly. Particularly, the stability of electrostatic filtration performance was found to be promising with the addition of BaTiO 3 . Possible microstructural changes after addition of BaTiO 3 were investigated via wide angle X-ray diffraction. Changes in crystal structure of PP upon addition of BaTiO 3 did not deteriorate electrostatic properties.

show abstract

Section: Microstructural Properties Of Batio 3 /Pp Websmentioning

confidence: 99%

Electrostatic Capture Efficiency Enhancement of Polypropylene Electret Filters with Barium Titanate

Kılıç

Shim

Pourdeyhimi

2015

Aerosol Science and Technology

View full text Add to dashboard Cite

show abstract

“…Barium titanate ͑BaTiO 3 ͒ is one of the most studied perovskite-type materials, especially due to its potentiality applications such as capacitive and nonvolatile memory cells (DRAMs and FRAMs), electro-optical integrated circuits, pyroelectric devices, etc. [1][2][3] It is well known that homovalent and heterovalent substitutions of barium or titanium ions give rise to various behaviors including relaxor properties, which may appear for some compositiontemperature ranges. [4][5][6] Additions such as strontium are employed to lower the Curie temperature T c , which decreases linearly with the increase of the strontium content.…”

Section: Introductionmentioning

confidence: 99%

Characterization of BaTi1−xZrxO3 thin films obtained by a soft chemical spin-coating technique

Pontes

Escote

Escudeiro

et al. 2004

Journal of Applied Physics

View full text Add to dashboard Cite

Single-phase perovskite structure BaZr x Ti 1−x O 3 (BZT) ͑0.05ഛ x ഛ 0.25͒ thin films were deposited on Pt-Ti-SiO 2 -Si substrates by the spin-coating technique. The structural modifications in the thin films were studied using x-ray diffraction and micro-Raman scattering techniques. Lattice parameters calculated from x-ray data indicate an increase in lattice (a axis) with the increasing content of zirconium in these films. Such Zr substitution also result in variations of the phonon mode wave numbers, especially those of lower wave numbers, for BaZr x Ti 1−x O 3 thin films, corroborate to the structural change caused by the zirconium doping. On the other hand, Raman modes persist above structural phase transition, although all optical modes should be Raman inactive in the cubic phase. The origin of these modes must be interpreted as a function of a local breakdown of the cubic symmetry, which could be a result of some kind of disorder. The BZT thin films exhibited a satisfactory dielectric constant close to 181-138, and low dielectric loss tan ␦ Ͻ 0.03 at the frequency of 1 kHz. The leakage current density of the BZT thin films was studied at elevated temperatures and the data obey the Schottky emission model. Through this analysis the Schottky barrier height values 0.68, 1.39, and 1.24 eV were estimated to the BZT5, BZT15, and BZT25 thin films, respectively.

show abstract

“…The diffraction peaks are broad which point to the formation of small crystallites in the film upon annealing at 700 C. The average crystallite size obtained as $39 nm using Scherrer formula by taking account of the peak broadening at (110) diffraction line. 21 Thermal annealing of the multilayer after deposition of BTO and CoFe layer initiates the formation of nanocrystallites in the CoFe layer with grain size of the order of 4 5 nm which is clearly visible in Figure 1(b). Inset of Figure 1(b) shows the HRTEM of CoFe alloy (recorded before the deposition of the surface BTO layer).…”

Section: Magnetoelectric Coupling Measurementsmentioning

confidence: 91%

Lead free heterogeneous multilayers with giant magneto electric coupling for microelectronics/microelectromechanical systems applications

Nair

Pookat

Saravanan

et al. 2013

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

Crystal structure and ferroelectricity of nanocrystalline barium titanate thin films

Cited by 48 publications

References 20 publications

Electrostatic Capture Efficiency Enhancement of Polypropylene Electret Filters with Barium Titanate

Electrostatic Capture Efficiency Enhancement of Polypropylene Electret Filters with Barium Titanate

Characterization of BaTi1−xZrxO3 thin films obtained by a soft chemical spin-coating technique

Lead free heterogeneous multilayers with giant magneto electric coupling for microelectronics/microelectromechanical systems applications

Contact Info

Product

Resources

About