Synthesis and Electrical Characterization of BaTiO3 Thin Films on Si(100)

Chinchamalatpure, Vijay Ramkrishna; Ghosh, Saswath; Chaudhari, G. N.

doi:10.4236/msa.2010.14029

Cited by 14 publications

(8 citation statements)

References 12 publications

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“…Small Raman band at 1058 cm -1 represents the presence of some BaCO 3 impurities in BaTiO 3 samples annealed at 600, 700, 800°C while Raman bands at 805 and 856 cm -1 for BaTiO 3 samples annealed at 900°C are related to the oxygen deficiencies. The observed Raman bands are consistent with the standard peaks reported for BaTiO 3 [17]. The appearance of Raman bands at 712 cm -1 and 304 cm -1 can be attributed to the highest longitudinal optical mode with A1 symmetry and the B 1 mode indicating the presence of asymmetry within the TiO 6 octahedra of BaTiO 3 , respectively.…”

Section: Resultssupporting

confidence: 86%

Influence of Annealing Temperatures on the Structural, Morphological,Crystalline and Optical properties of BaTiO3 and SrTiO3 Nanoparticles

Ea¹,

Sm²,

Yo³

et al. 2016

J Material Sci Eng

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In this study, highly crystalline BaTiO 3 and SrTiO 3 nanoparticles were synthesized by bi-modal distribution solution process followed by annealing at different temperatures. The impact of annealing temperatures on the nanoparticles was investigated by their various chemical, structural and surface properties. The particle sizes of both BaTiO 3 and SrTiO 3 increased from 30-80 nm with increase in annealing temperature due to the agglomeration of the nanoparticles. It was found that the optical band gap of BaTiO 3 and SrTiO 3 was considerably decreased with the increase of annealing temperatures from 500 -900°C. With the observed results, we can say that annealing BaTiO 3 and SrTiO 3 nanoparticles significantly enhance their optical, structural, morphological and crystalline properties.

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Section: Resultssupporting

confidence: 86%

Influence of Annealing Temperatures on the Structural, Morphological,Crystalline and Optical properties of BaTiO3 and SrTiO3 Nanoparticles

Ea¹,

Sm²,

Yo³

et al. 2016

J Material Sci Eng

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“…Moreover, the emergence of a maximum at 599 cm −1 is a specific fingerprint of hydroxyapatite [71]. The vibrational band typical of the Ti-O bond, which is located somewhere in the range 450-550 cm −1 , is hidden by the more intense contributions of the (PO 4 ) 3− group [16,72,73]. The FTIR spectra registered on the samples subjected to heat treatments exhibit a well-defined individual band with a maximum around 720 cm −1 (Figure 8b); this is a mark of the vibrational characteristics of the (P 2 O 7 ) 4− group, which was formed by a condensation reaction between two (HPO 4 ) 2− groups at high temperatures [17,74].…”

Section: Resultsmentioning

confidence: 99%

Electrospun Fibre Webs Templated Synthesis of Mineral Scaffolds Based on Calcium Phosphates and Barium Titanate

et al. 2020

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The current work focuses on the development of mineral scaffolds with complex composition and controlled morphology by using a polymeric template in the form of nonwoven fibre webs fabricated through electrospinning. By a cross-linking process, gelatine fibres stable in aqueous solutions were achieved, these being further subjected to a loading step with two types of mineral phases: calcium phosphates deposited by chemical reaction and barium titanate nanoparticles as decoration on the previously achieved structures. Thus, hybrid materials were obtained and subsequently processed in terms of freeze-drying and heat treating with the purpose of burning the template and consolidating the mineral part as potential bone implants with improved biological response by external stimulation. The results confirmed the tunable morphology, as well as the considerable applicability of both as-prepared and final samples for the development of medical devices, which encourages the continuation of research in the direction of assessing the synergistic contribution of barium titanate domains polarisation/magnetisation by external applied fields.

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“…Additionally, Farahmandjou and Abeiyan ascribe the band at 730 cm −1 to the V–O–V asymmetric stretching. FTIR spectra of the doped sample show a band at 785 cm −1 , which corresponds to vibrations of the Zr–O bond [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

In-Operando Diffraction and Spectroscopic Evaluation of Pure, Zr-, and Ce-Doped Vanadium Dioxide Thermochromic Films Derived via Glycolate Synthesis

et al. 2020

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Pure and doped vanadia (VO2, V0.98Zr0.02O2, V0.98Ce0.02O2) samples were prepared by wet chemistry synthesis from vanadyl glycolate intermediate phase and tape casted into films. Combining in-operando grazing incidence synchrotron X-ray diffraction and Raman spectroscopy, we studied the structural evolution of the films under isothermal conditions. The setup allowed assessment of the thermochromic functionality with continuous monitoring of the monoclinic to tetragonal transition in pure and doped vanadia phases, responsible for the transmission and reflection of light in the infrared part of the solar spectrum. The materials characterisation by X-ray diffraction beamline (MCX) goniometer demonstrated ideal performance, combining flexible geometry, high resolution, and the potential to accommodate the multi-channel equipment for in-operando characterisation. This method proved viable for evaluating the relevant structural and physical, and thereof functional properties of these systems. We revealed that dopants reduce the transition temperature by 5 °C on average. The synthetic route of the films was held responsible for the observed phase separation. The more favourable behaviour of cerium-doped sample was attributed to cerium alkoxide behaviour. In addition, structural, microstructural, thermal, and spectroscopic characterisation on powder samples was performed to gain more insight into the development of the phases that are responsible for thermochromic features in a broader range of doping ratios. The influence of the dopants on the extent of the thermochromic transition (transmission to reflection hysteresis) was also evaluated using (micro) structural, thermal and spectroscopic methods of powder samples. Characterisations showed that zirconium doping in 2, 4, and 6 mol% significantly influenced the phase composition and morphology of the precursor. Vanadium oxides other than VO2 can easily crystallise; however, a thermal treatment regime that allowed crystallisation of VO2 as a single phase was established.

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Synthesis and Electrical Characterization of BaTiO3 Thin Films on Si(100)

Cited by 14 publications

References 12 publications

Influence of Annealing Temperatures on the Structural, Morphological,Crystalline and Optical properties of BaTiO3 and SrTiO3 Nanoparticles

Influence of Annealing Temperatures on the Structural, Morphological,Crystalline and Optical properties of BaTiO3 and SrTiO3 Nanoparticles

Electrospun Fibre Webs Templated Synthesis of Mineral Scaffolds Based on Calcium Phosphates and Barium Titanate

In-Operando Diffraction and Spectroscopic Evaluation of Pure, Zr-, and Ce-Doped Vanadium Dioxide Thermochromic Films Derived via Glycolate Synthesis

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