Characterisation And Dielectric Property Analysis  of A-site Doped LaTiO3-δ Perovskites Synthesised by Ball Milling Method

Madhavan, Bradha; Ashok, Anuradha

doi:10.5185/amlett.2015.5827

Cited by 6 publications

(3 citation statements)

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“… 48 ), and the dielectric relative permittivity ε r = 16.39 (ref. 49 ). This formalism with the approximated damping constant provides the mode amplitude as a function of time presented in Fig.…”

Section: Methodsmentioning

confidence: 99%

Ultrafast Band Engineering and Transient Spin Currents in Antiferromagnetic Oxides

Rondinelli

2016

Sci Rep

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We report a dynamic structure and band engineering strategy with experimental protocols to induce indirect-to-direct band gap transitions and coherently oscillating pure spin-currents in three-dimensional antiferromagnets (AFM) using selective phononic excitations. In the Mott insulator LaTiO3, we show that a photo-induced nonequilibrium phonon mode amplitude destroys the spin and orbitally degenerate ground state, reduces the band gap by 160 meV and renormalizes the carrier masses. The time scale of this process is a few hundreds of femtoseconds. Then in the hole-doped correlated metallic titanate, we show how pure spin-currents can be achieved to yield spin-polarizations exceeding those observed in classic semiconductors. Last, we demonstrate the generality of the approach by applying it to the non-orbitally degenerate AFM CaMnO3. These results advance our understanding of electron-lattice interactions in structures out-of-equilibrium and establish a rational framework for designing dynamic phases that may be exploited in ultrafast optoelectronic and optospintronic devices.

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Section: Methodsmentioning

confidence: 99%

Ultrafast Band Engineering and Transient Spin Currents in Antiferromagnetic Oxides

Rondinelli

2016

Sci Rep

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“…Better antibacterial activity of LaNiO 3 against Gram-positive bacteria, Staphylococcus aureus was reported by Jadhav et al [ 10 ]. Among the different perovskites, lanthanum titanates (LaTiO 3-δ ) are promising materials with numerous applications in different areas such as electrooptical, piezoelectric, dielectric, ferroelectric, and electrical conductivity, because of their unique dielectric, electrical conductivity, ferroelectric, and catalytic properties [ 11 – 13 ]. Yet, there is not much scientific literature available regarding the biological activity studies of lanthanum titanates.…”

Section: Introductionmentioning

confidence: 99%

“…Doping nanoparticles offers a versatile means of tuning the properties without altering their large surface area, so that their performance can be enhanced. Over the past few decades, there has been a lot of research done on perovskite-type oxides, particularly those having rare earth ions like La on the A site and transition-metal ions on the B site [ 13 ]. Doping in the cationic sites can significantly enhance the materials' electrical, magnetic, optical, and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Yttrium doping on antibacterial and antioxidant property of LaTiO3

Prabitha,

Sahadevan,

Madhavan

et al. 2023

Discover Nano

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The advancement of multidrug-resistant bacterial strains and their adverse effects is one of the most significant global health issues. The perovskite nanomaterial with combined antioxidant and antibacterial activities in one molecule has the potential for improved therapeutic solutions. In this work, Yttrium-doped Lanthanum Titanate (LaTi1 −xYxO3, where x = 0, 0.05, and 0.1) was synthesized using auto combustion technique. Excellent crystalline structure with a tetragonal system is revealed by X-ray diffraction analysis (XRD). UV–Visible diffuse reflectance spectroscopy (UV–Vis DRS), Fourier transform infrared (FTIR), and photoluminescence (PL) were used to study its optical characteristics. The field emission scanning electron microscope (FE-SEM) shows rod-like pellet-shaped Yttrium-doped nanostructures, and the elements present were confirmed with the Energy Dispersive X-Ray Analysis (EDAX). Various concentrations of the synthesized materials were tested for antibacterial activity against Gram-positive (Staphylococcus aureus 902) and Gram-negative (E. coli 443) strains using the agar-well diffusion method with gentamicin antibiotic as a positive control. High antibacterial activity of 87.1% and 83.3% was shown by 10% Yttrium-doped LaTiO3 (LY(0.1)TO) at 500 mg/mL against both positive and negative stains, respectively. Moreover, the antioxidant properties of synthesized materials were assessed with IC50 values of 352.33 µg/mL, 458.055 µg/mL, and 440.163 µg/mL for samples LaTi1 − xYxO3, where x = 0, 0.05, and 0.1 respectively. The antibacterial and antioxidant capabilities of the proposed samples illustrate their applicability in various biomedical applications.

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Soft chemistry synthesis and dielectric properties of A-site deficient perovskite-type compound La 2/3 TiO 3−δ

Bugrov

Abdulaeva

Silyukov

et al. 2016

Ceramics International

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Characterisation And Dielectric Property Analysis of A-site Doped LaTiO3-δ Perovskites Synthesised by Ball Milling Method

Cited by 6 publications

References 0 publications

Ultrafast Band Engineering and Transient Spin Currents in Antiferromagnetic Oxides

Ultrafast Band Engineering and Transient Spin Currents in Antiferromagnetic Oxides

Effect of Yttrium doping on antibacterial and antioxidant property of LaTiO3

Soft chemistry synthesis and dielectric properties of A-site deficient perovskite-type compound La 2/3 TiO 3−δ

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