A5036679466- Nonlinear Optical Materials Research
- Magnetic Properties and Synthesis of Ferrites
- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Advanced Thermoelectric Materials and Devices
- Electromagnetic wave absorption materials
- Dielectric properties of ceramics
- Nonlinear Optical Materials Studies
- Protein Interaction Studies and Fluorescence Analysis
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Solid-state spectroscopy and crystallography
- Crystallography and molecular interactions
- Quantum Dots Synthesis And Properties
- Molecular spectroscopy and chirality
- Advanced Condensed Matter Physics
- Laser-Ablation Synthesis of Nanoparticles
- Chemical synthesis and pharmacological studies
- Metallic Glasses and Amorphous Alloys
- Nanocluster Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Crystal structures of chemical compounds
- Luminescence and Fluorescent Materials
- Thermal Expansion and Ionic Conductivity
- Gas Sensing Nanomaterials and Sensors
Moore College
2024
Kerala State Council for Science, Technology and Environment
2017-2018
Cochin University of Science and Technology
2013-2016
Central Electrochemical Research Institute
2014
Government Medical College
2014
Central University of Kerala
2014
Rice University
2014
The frequency-dependent and temperature-dependent dielectric dispersion of yttrium (Y 3+ ) substituted CoFe 2 O 4 (CoFe 2-x Y x has been explained with the help structural symmetry electronic transitions between ions in octahedral (O h and...
Lanthanum calcium manganites (La0.5Ca0.5MnO3) with a composition close to charge ordering, synthesized by high energy ball milling, was found exhibit colossal thermoelectric power. Thermoelectric power (TEP) data systematically analyzed dividing the entire temperature range (5 K–300 K) into three different regimes explore scattering mechanisms involved. Mandal's model has been applied explain TEP in region below Curie (TC). It that variation of is pronounced when system enters ordered at T...
Abstract Pristine and Dy substituted MnFe 2 O 4, 2− x 4 ( = 0.00, 0.02, 0.04, 0.06, 0.08 & 0.10) were successfully synthesized by sol-gel method to investigate the dielectric properties of system. exhibits a high permittivity order 10 which is further augmented 60% through substitution. This owing rise in interfacial polarization resulting from localized states, dipolar arising multiple valence states Fe Mn ions, atomic due structural distortion induced strain, electronic stemming...
Commercial samples of Magnetite with size ranging from 25–30 nm were coated polyaniline by using radio frequency plasma polymerization to achieve a core shell structure magnetic nanoparticle (core)–Polyaniline (shell). High resolution transmission electron microscopy images confirm the architecture iron oxide. The dielectric properties material studied before and after treatment. polymer magnetite particles exhibited large permittivity respect uncoated samples. behavior was modeled...
The structural and non-linear optical properties of the Schiff base material, 4-chloro-4′bromobenzylidene aniline (CBBA) were analysed using FTIR, FT-Raman, UV Nuclear Magnetic Resonance spectral techniques together with DFT method Z-scan technique. Natural Bond Orbital (NBO) analysis was employed to analyse intramolecular electronic interactions leading stability molecule. complete vibrational assignments performed based on scaled quantum mechanical force field procedure. energies frontier...
Silver nanoparticles were dispersed in the pores of monolithic mesoporous silica prepared by a modified sol–gel method. Structural and microstructural analyses carried out Fourier transform infrared spectroscopy transmission electron microscopy. X-ray photoelectron was employed to determine chemical states silver matrix. Optical absorption studies show evolution band around 300 nm for (Ag) matrix it found be redshifted 422 on annealing. Photoluminescence indicate presence various luminescent...
The present work derives motivation from the so called surface/interfacial magnetism in core shell structures and commercial samples of Fe3O4 γ Fe2O3 with sizes ranging 20 to 30 nm were coated polyaniline using plasma polymerization studied. High Resolution Transmission Electron Microscopy images indicate a structure after coating exhibited an increase saturation magnetization by 2 emu/g. For confirmation, was performed on maghemite nanoparticles which also magnetization. This enhanced is...
Earlier we observed colossal thermoelectric power in charge ordered intermediate band width manganite La0.5Ca0.5MnO3 and was explained based on ordering occurrence of spin glass states. With a view to extending such study small Gd-Sr manganites, both unmilled milled forms Gd1−xSrxMnO3 (x = 0.3, 0.5, 0.6) samples were prepared. Nano prepared by high energy ball milling. All compositions, forms, exhibited power. The absolute value almost doubled the case attained maximum −69 mV K−1 at 42 K,...
Polycrystalline GdFe1-xNixO3(x = 0.00, 0.02, 0.04) samples was synthesised using a glycine assisted sol-gel method to investigate the enhanced magnetic and electric properties of Ni substituted GdFeO3systems. TG-DSC analysis prepared confirms that GdFe1-xNixO3have good thermal stability in high temperatures. The system has been stabilized an orthorhombic structure with space group Pbnm.The elemental composition GdFe1-xNixO3has estimated from EDAX spectrum. results showed oxygen deficiency on...