Temperature-Dependent Delocalization of Oxygen Vacancies in La-Substituted CeO2

M Gupta, SC Shirbhate, OV Rambadey… - ACS Applied Energy …, 2022 - ACS Publications
Signature of oxygen ion conductivity in hydrothermally synthesized Ce1–x La x O2− δ (0≤
x≤ 0.50) solid-electrolyte samples has been investigated. Room-temperature Raman …

Investigation of temperature-dependent optical properties of TiO2 using diffuse reflectance spectroscopy

V Mishra, MK Warshi, A Sati, A Kumar, V Mishra… - SN Applied …, 2019 - Springer
Temperature-dependent diffuse reflectance spectroscopy (DRS) measurements have been
carried out on the polycrystalline sample TiO 2. Important values from optical parameters …

Investigating the correlation between the Urbach energy and asymmetry parameter of the Raman mode in semiconductors

OV Rambadey, A Kumar, PR Sagdeo - Physical Review B, 2021 - APS
A quantitative correlation between the Urbach energy (E u) and asymmetry parameter q of
Raman spectra has been derived. For this purpose, the effect of electronic disorder (∼ E u) …

Uncovering Temperature-Induced Changes in Bandgap and Electronic Heterogeneity in Transition Metal Oxides through Optical Absorption Spectroscopy: A Review

M PrajnaShree, S Pandey, A Sati, R Trivedi… - Physica B: Condensed …, 2024 - Elsevier
The progress made in transition metal oxides has resulted in the identification of numerous
potential applications in nanoelectronics, photonics, sensing, energy storage, and …

Temperature-dependent dielectric loss in BaTiO3: Competition between tunnelling probability and electron-phonon interaction

A Sati, A Kumar, V Mishra, K Warshi, P Pokhriyal… - Materials Chemistry and …, 2021 - Elsevier
The temperature-dependent impedance spectroscopy, optical absorption spectroscopy, and
Raman spectroscopic measurements have been carried out on BaTiO 3 in the temperature …

Effect of structural disorder on the electronic and phononic properties of Hf doped BaTiO3

A Sati, V Mishra, A Kumar, MK Warshi… - Journal of Materials …, 2019 - Springer
The classical ferroelectric material BaTiO 3 has been doped with large cation ie, Hf at Ti site
in order to understand the effect of structural disorder in electronic and phononic state. The …

Strain induced disordered phonon modes in Cr doped PrFeO3

A Kumar, V Mishra, MK Warshi, A Sati… - Journal of Physics …, 2019 - iopscience.iop.org
Room temperature optical absorption spectroscopy (OAS) and Raman spectroscopy
measurements have been carried out in order to understand the effect of structural disorder …

Methodology to Probe Disorder Contribution in Raman Linewidth via Optical Absorption Spectroscopy in Orthoferrite EuFeO3

OV Rambadey, A Kumar, K Kumar… - The Journal of …, 2022 - ACS Publications
The individual impact of disorder on different phonon modes has been investigated for
orthoferrite EuFeO3 by perceiving a correlation between temperature-dependent Raman …

Optimal Doping of Ho3+ in CaTiO3 Perovskite for Enhanced Photoluminescence and Sustainable Green Emission

V Singh, AA Bhat, AR Kadam… - Journal of Electronic …, 2024 - Springer
In this work, the synthesis of Ho3+-doped calcium titanate perovskite (CaTiO3) revealed
significant photoluminescence (PL) properties, predominantly displaying a distinct green …

Probing the effect of R-cation radii on structural, vibrational, optical, and dielectric properties of rare earth (R= La, Pr, Nd) aluminates

M Gupta, OV Rambadey, PR Sagdeo - Ceramics International, 2022 - Elsevier
The present study correlates the effect of R-cation radii on structural, vibrational, optical, and
dielectric properties of rhombohedral rare earth aluminates RAlO 3 (R= La, Pr, Nd). The …