A5079263741- Iron-based superconductors research
- ZnO doping and properties
- Rare-earth and actinide compounds
- Gas Sensing Nanomaterials and Sensors
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- Copper-based nanomaterials and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Advanced Condensed Matter Physics
- Electronic and Structural Properties of Oxides
- Quantum chaos and dynamical systems
- Advanced Photocatalysis Techniques
- Ga2O3 and related materials
- Inorganic Fluorides and Related Compounds
- Quantum, superfluid, helium dynamics
- Transition Metal Oxide Nanomaterials
- Superconductivity in MgB2 and Alloys
- Shape Memory Alloy Transformations
- Multiferroics and related materials
- Quantum Mechanics and Non-Hermitian Physics
- Graphene research and applications
- 2D Materials and Applications
- Characterization and Applications of Magnetic Nanoparticles
- High-pressure geophysics and materials
Bharathidasan University
2014-2023
University of Cambridge
2023
University of Alabama at Birmingham
2018-2020
Dhanalakshmi Srinivasan Group of Institutions
2019
National Institute of Technology Tiruchirappalli
2018
India Habitat Centre
2015
Anna University, Chennai
2010
Queen's University Belfast
1996-1997
Crystal structure and properties of a new member oxy-bismuth-sulfide SmO1-xFxBiS2 are reported here. The compounds (x = 0.0 0.5) found to be isostructural with LaOBiS2 crystallize in the CeOBiS2 type (P4/nmm). Sm substitution LaO0.5F0.5BiS2, (La1-ySmyO0.5F0.5BiS2), leads gradual decrease a-lattice constant however c-lattice does not show such trend. Enhancement Tc is achieved upon partially substituting La by smaller ion. Maximum ~ 4.6 K was observed for composition y 0.8. Disobeying this...
A multi metal oxide nanocomposite involving CdO, Al2O3 and NiO was synthesized by precipitation method. The x-ray diffraction (XRD), photoelectron spectroscopy (XPS) Fourier transform infrared (FT-IR) analyses confirmed the formation of heterostructured CdO–Al2O3–NiO composite. Diffraction peaks related to cubic monoclinic were observed in XRD pattern SEM images presence spherical shaped grains for nanorods nanoneedles NiO. Improved photocatalytic activity composite better than binary...
Abstract Pure CdO nanopowder and CdO-Fe 3 O 4 nanocomposite were synthesized by a cost effective chemical method, the samples characterized XRD, SEM, TEM, FT-IR, UV-Vis-NIR PL. Also, magnetic photocatalytic properties of studied. XRD patterns composite confirm presence diffraction peaks related to both Fe . EDX spectrum confirms elements Cd, in composite. Peaks Cd–O Fe–O bonds observed respectively at 688 cm −1 592 FT-IR spectrum. The paramagnetic behavior pure becomes ferromagnetic when...
We consider n = 20 Rydberg states of the hydrogen atom interacting with a nearby metal surface over an - distance range 105 nm 530 nm. show that traditional quadratic approximation to potential is insufficient follow true and one needs include higher order terms obtain accurate energies for these states. up eighth in electron-proton demonstrate by means basis set calculations resulting spectra differ significantly from those obtained approximation. observe energy spread manifold which...
Nanostructured ternary Zn-doped CdS (CdZnS) thin films were fabricated from fresh and aged (1, 2, 3 4 days) starting solutions by the spray pyrolysis technique using a perfume atomizer. X-ray diffraction studies showed that are polycrystalline in nature exhibiting hexagonal crystal structure with (0 0 2) preferential orientation. SEM images film prepared 1 day solution possesses randomly oriented crystallites of elongated needle shape. The optical band gap values exhibit red shift aging time...
Superconducting properties of Cr0.0005NbSe2 (Tc~6.64 K) single crystals have been investigated through the temperature dependent resistivity (~8 GPa) and DC magnetization (~1 measurements. Further, critical current density (Jc) as a function applied magnetic field has studied from isotherms. The vortex pinning mechanisms also systematically analyzed using weak collective theory pressure. Jc corresponds to flux flow enhanced by application pressure due increase Tc changes. We found that is...
Abstract We investigate the external hydrostatic pressure effect on superconducting transition temperature ( T c ) of new layered superconductors Bi 4 O S 3 and NdO 0.5 F BiS 2 . Though is found to have a moderate decrease from 4.8 K 4.3 (d onset /d P = –0.28 K/GPa) for superconductor, same increases 4.6 5 0.44 up 1.31 GPa followed by sudden 4.7 1.75 superconductor. The variation in these systems may be correlated an increase or charge carriers density states under externally applied...
We have synthesized two new Eu-based compounds, EuSr2Bi2S4F4 and Eu2SrBi2S4F4 which are derivatives of Eu3Bi2S4F4, an intrinsic superconductor with Tc = 1.5 K. They belong to a tetragonal structure (SG: I4/mmm, Z 2), similar the parent compound Eu3Bi2S4F4. Our structural 151Eu M\"ossbauer spectroscopy studies show that in EuSr2Bi2S4F4, Eu-atoms exclusively occupy crystallographic 2a-sites. In Eu2SrBi2S4F4, 2a-sites fully occupied by other half Sr-atoms together 4e-sites statistical...
The classical dynamics of a hydrogen atom in generalized van der Waals potential is investigated. In order to carry out the analytical and numerical investigations for range parametric values, we removed singularity problem using Levi-Civita regularization converted into that two coupled sextic anharmonic oscillators. We identify integrable choices oscillator system Painlev\'e analysis, associated second integrals motion are derived extended Lie transformations. Numerical carried other...