A5015835437- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Dielectric properties of ceramics
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Advanced Condensed Matter Physics
- Transition Metal Oxide Nanomaterials
- High-pressure geophysics and materials
- Magnetic Properties and Applications
- Pigment Synthesis and Properties
- Gas Sensing Nanomaterials and Sensors
- Thermal Expansion and Ionic Conductivity
- Nuclear materials and radiation effects
- Advanced Thermoelectric Materials and Devices
- Grey System Theory Applications
- Microwave Dielectric Ceramics Synthesis
Aligarh Muslim University
2018-2024
The nanocrystalline samples of NdFeO3(NFO) and NdFe0.7 Zn0.3O3(NFZO) synthesized by sol-gel combustion route have been investigated for their structural, morphological optical properties. XRD patterns with Rietveld refinement reveal the orthorhombic structure Pbnm space group. calculated values tolerance factor indicatetowards enhanced distortion Zn doping. Fe-O-Fe bond angle Fe-O length are found to decrease Williamson-Hall analysis is used determine average crystallite size lattice strain...
Abstract This work delivers the research findings of temperature dependent DC resistivity, AC impedance and ferroelectric polarization GdCr 1−x Mn x O 3 (x = 0 0.3). Mixed valence states Cr (Cr 3+ 4+ ) are explored using x-ray photoelectron spectroscopy analysis. The exponential decay resistivity on escalating advocates semiconducting-like nature for probed samples. data these samples fit well into small-polaron hopping variable range models. attributes were scrutinized over a broad spectrum...
Pure and Co doped Lanthanum chromite (LaCrO3) nanoparticles, LaCr1-xCoxO3 (0≤x≤0.3), have been synthesized through sol-gel process their structural, morphological dielectric properties studied. X ray diffraction patterns reveal that the samples are in single phase having orthorhombic structure with Pnma space group. Structural parameters refined by Rietveld refinement using Fullprof software. Lattice unit cell volume found to decrease increase doping. Crystallite size is calculated Scherrer...
The polycrystalline NdFeO3 (NFO), SrTiO3 (STO) and NFO-STO composite systems were synthesized by modified solid-state reaction route. Rietveld refinement fitting of x-ray diffraction data confirmed the phase purity crystal structure materials. NFO STO found in orthorhombic cubic phases with Pbnm Pm-3m space groups respectively. Surface morphology elemental compositions prepared ceramics analyzed field emission scanning electron microscopy (FESEM) energy-dispersive spectroscopy (EDS). Room...
We have synthesized nanocrystalline La0.8Pb0.2Cr1-xCoxO3 (0≤x≤0.3) through sol-gel process and studied their structural optical properties. X-ray diffraction patterns reveal that the samples conform in orthorhombic crystal symmetry with Pnma space group. Structural parameters are refined by Rietveld Refinement using Fullprof software. Lattice unit cell volume of doped found to decrease increase Co doping. The energy band gapdecreases whereas Urbach increases content.
Nano crystalline samples of LaCr1-xZnxO3 (x=0, 0.1, 0.2, and 0.3) are synthesized by the sol-gel process their structural, morphological, vibrational thermal properties explored. X-ray diffraction patterns reveal that all conform inorthorhombic crystal symmetrywith Pnma space group. Surface morphology as examined SEM analysis shows heterogeneous particle dispersal displaying susceptibility towards agglomeration. EDX spectra confirmsthat devoid any impurities. Raman indicates presence two...
La0.9Bi0.1Cr1-xMnxO3 (0≤x≤0.3) samples have been prepared using the sol-gel process. These analyzed for their structural and dielectric properties. X-ray diffraction patterns affirm that orthorhombic crystal symmetry with Pnma space group. Crystallite size is calculated by employing Williamson-Hall analysis found to decrease increase in Mndoping. FTIR spectrajustify formation of (0≤x≤0.3). Dielectric constant increases Mn concentration colossal values. Impedance Nyquist plots reveal...
Nanocrystalline samples of pristine BiFeO3(BFO) and (Nd,Ni) co-doped BFO (Bi0.9Nd0.1Fe0.9Ni0.1O3) have been synthesized through the sol-gel auto combustion process characterized to probe influence doping on its dielectric ferroelectric properties. The frequency dependent measurements carried out at room temperature reveal dispersive nature constant within low regime which further becomes higher frequencies. real imaginary parts exhibit significant rise with Nd Ni doping, is attributed...
BiFeO 3 (BFO)and Bi 0.9 Nd 0.1 Fe Ni O (BNFNO) nanocrystalline samples have been synthesized through the sol-gel auto combustion process. Frequency and temperature dependent dielectric measurements performed in order to apprehend influence of (Nd,Ni) co-doping on conduction mechanism pristine BFO.Thereal part constant is found increase with doping, which accredited higher space charge polarization induced by dopant ions.The measured as a function frequency exhibits dispersivebehaviour within...