Induced ferromagnetism and enhanced optical behaviour in indium-doped barium stannate system

Avinash, M. B.; Muralidharan, M.; Selvakumar, S.; Hussain, Shamima; Sivaji, K.

doi:10.1007/s10854-020-02886-x

Cited by 10 publications

(9 citation statements)

References 58 publications

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“…Figure a illustrates the experimental EPR spectrum obtained for the h –BAS powder and Figure b the corresponding simulated curve using a g value of 1.974. This gyromagnetic value matches well with a previously reported g value of single ionized barium vacancies (V Ba ′ ) in BaTiO 3 ceramics − and in BaSnO 3 nanostructures . Furthermore, Kutty et al reported an EPR signal with a g value of 1.997 attributed to V Ba ′ defects present in the orthorhombic and rhombohedral phases of BaTiO 3 , observing that the value remains unchanged with variations in the spatial distribution of the electric field present in these two different crystalline lattices.…”

Section: Resultsmentioning

confidence: 99%

Barium Vacancies as the Origin of Triboluminescence in Hexacelsian Ceramics: An Ab Initio and Experimental Investigation

Novitskaya,

Amachraa,

Martínez-Pallares

et al. 2024

ACS Appl. Opt. Mater.

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We describe the triboluminescence response of undoped (BaAl 2 Si 2 O 8 , h−BAS) and Eu-doped (h−BAS:Eu) barium hexacelsian powders and show that the triboluminescence behavior is dependent on the formation of barium vacancies. X-ray photoelectron spectroscopy of the h−BAS:Eu powders confirms the presence of Eu 3+ and Eu 2+ in the compound, leading to the formation of significant vacancy point defects in excess of those found in h−BAS as a result of the charge imbalance caused by the substitution of Eu 3+ in Ba 2+ sites. From electron paramagnetic resonance measurements and density functional theory (DFT) calculations, we demonstrate that the vacancy defects correspond to singly ionized barium vacancies. DFT-calculated thermodynamic transitions and electronic structure calculations reveal deep energy levels within the compound's energy band gap, with a strong emission at 3.33 eV correlated to an electron exchange between the conduction band minimum and a barium vacancy center. Time-resolved triboluminescence spectra show that the increased concentration of barium vacancies in h−BAS:Eu enhances the signal by about 75% compared to the signal from h−BAS. These results play an important role in the understanding of fundamental mechanisms behind the triboluminescence response of ceramic materials as well as the role of different types of defects in this process.

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Section: Resultsmentioning

confidence: 99%

Barium Vacancies as the Origin of Triboluminescence in Hexacelsian Ceramics: An Ab Initio and Experimental Investigation

Novitskaya,

Amachraa,

Martínez-Pallares

et al. 2024

ACS Appl. Opt. Mater.

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“…Kelly [2] very clearly stresses that the composites should not be regarded simple as a combination of two materials. In the broader significance; the combination has its own distinctive properties.…”

Section: Literature Reviewmentioning

confidence: 99%

Study of Mechanical Properties of Banana and E-Glass Fiber Composite

Haribabu¹

2018

IJTSRD

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The purpose of this research work is evaluated and compares the mechanical properties of laminates prepared of different components of banana and E glass fibers. The mechanical properties evaluated are tensile strength flexural strength, impact strength. The four laminates of banana and E-glass fibers of dimensions 150*150*5 mm^3 is fabricated by using by hand layup method.From the results of the testing process, it is found that the maximum tensile strength, maximum flexural strength and maximum impact strength is observed in pure E-glass fiber laminate and minimum in pure banana fiber laminate. From the entire test, it is found that as the glass layer in the laminate increases its mechanical properties enhances.

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“…The induced ferromagnetism and enhanced optical behavior in indium-doped BTO system had been reported due to the relatively non-toxic, easily fusible nature and high mobility, trapping and electron generation rate for In. [8] The photocatalytic efficiency of BTO can be enhanced by In doping as a result of its capability to hinder the electron-hole recombination. [9] Indium is usually used in acceptor substituted BaSn 1−x In x O 3−y proton conductors.…”

Section: Introductionmentioning

confidence: 99%

Optical and electrical properties of BaSnO₃ and In₂O₃ mixed transparent conductive films deposited by filtered cathodic vacuum arc technique at room temperature

Yao¹,

Zhong²

2023

Chinese Phys. B

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For the crystalline temperature of BaSnO3 (BTO) was above 650 ℃, the transparent conductive BTO based films were always deposited above this temperature on epitaxy substrates by pulsed laser deposition or molecular beam epitaxy till now which limited there application in low temperature device process. In the article, the microstructure, optical and electrical of BTO and In2O3 mixed transparent conductive BaInSnOx (BITO) film deposited by filtered cathodic vacuum arc technique (FCVA) on glass substrate at room temperature were firstly reported. The BITO film with thickness of 300 nm had mainly In2O3 polycrystalline phase, and minor polycrystalline BTO phase with (001), (011), (111), (002), (222) crystal faces which were first deposited at room temperature on amorphous glass. The transmittance was 70-80 % in the visible light region with linear refractive index of 1.94 and extinction coefficient of 0.004 at 550 nm wavelength. The basic optical properties included the real and imaginary parts and high frequency dielectric constants, the absorption coefficient, and the Urbach energy and the indirect and direct band gaps, and the oscillator and dispersion energies, and the static refractive index and dielectric constant, and the average oscillator wavelength and oscillator length strength, and the linear and third-order nonlinear optical susceptibilities and the nonlinear refractive index were all calculated. The film was n type conductor with sheet resistance of 704.7 Ω/□, resistivity of 0.02 Ω ·cm and mobility of 18.9 cm2/V·s and carrier electron concentration of 1.6×1019 cm-3 at room temperature. The results suggested that BITO film deposited by FCVA had potential application in transparent conductive films based low temperature device process.

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Induced ferromagnetism and enhanced optical behaviour in indium-doped barium stannate system

Cited by 10 publications

References 58 publications

Barium Vacancies as the Origin of Triboluminescence in Hexacelsian Ceramics: An Ab Initio and Experimental Investigation

Barium Vacancies as the Origin of Triboluminescence in Hexacelsian Ceramics: An Ab Initio and Experimental Investigation

Study of Mechanical Properties of Banana and E-Glass Fiber Composite

Optical and electrical properties of BaSnO₃ and In₂O₃ mixed transparent conductive films deposited by filtered cathodic vacuum arc technique at room temperature

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Induced ferromagnetism and enhanced optical behaviour in indium-doped barium stannate system

Cited by 10 publications

References 58 publications

Barium Vacancies as the Origin of Triboluminescence in Hexacelsian Ceramics: An Ab Initio and Experimental Investigation

Barium Vacancies as the Origin of Triboluminescence in Hexacelsian Ceramics: An Ab Initio and Experimental Investigation

Study of Mechanical Properties of Banana and E-Glass Fiber Composite

Optical and electrical properties of BaSnO3 and In2O3 mixed transparent conductive films deposited by filtered cathodic vacuum arc technique at room temperature

Contact Info

Product

Resources

About

Optical and electrical properties of BaSnO₃ and In₂O₃ mixed transparent conductive films deposited by filtered cathodic vacuum arc technique at room temperature