A5083440483- Multiferroics and related materials
- Magnetic properties of thin films
- Magnetic Properties and Synthesis of Ferrites
- Ferroelectric and Piezoelectric Materials
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties and Applications
- Advanced Condensed Matter Physics
- Iron oxide chemistry and applications
- Magneto-Optical Properties and Applications
- Microwave Dielectric Ceramics Synthesis
- Magnetic Properties of Alloys
- Metallic Glasses and Amorphous Alloys
- Theoretical and Computational Physics
- ZnO doping and properties
- Ion-surface interactions and analysis
- Rare-earth and actinide compounds
- Electronic and Structural Properties of Oxides
- Acoustic Wave Resonator Technologies
- Dielectric properties of ceramics
- Physics of Superconductivity and Magnetism
- Metal and Thin Film Mechanics
- Microstructure and mechanical properties
- Electromagnetic wave absorption materials
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
UGC DAE Consortium for Scientific Research
2016-2025
University Grants Commission
2015-2024
Bhabha Atomic Research Centre
2021-2024
University of Hyderabad
2023
Raja Ramanna Centre for Advanced Technology
2014-2022
Homi Bhabha National Institute
2017-2022
University of Petroleum and Energy Studies
2021
Deutsches Elektronen-Synchrotron DESY
2021
Stanley Medical College
2020
Chaitanya Bharathi Institute of Technology
2020
High coercivity (9.47 kOe) has been obtained for oleic acid capped chemically synthesized CoFe(2)O(4) nanoparticles of crystallite size approximately 20 nm. X-ray diffraction analysis confirms the formation spinel phase in these nanoparticles. Thermal annealing at various temperatures increases particle and ultimately shows bulk like properties 56 The nature bonding with amount sample is determined by Fourier transform infrared spectroscopy thermogrvimetric analysis, respectively. Raman...
Structural, dielectric, ferroelectric (FE), 119Sn Mössbauer, and specific heat measurements of polycrystalline BaTi1–xSnxO3 (x = 0% to 15%) ceramics are reported. Phase purity homogeneous phase formation with Sn doping is confirmed from x-ray diffraction Mössbauer measurements. With doping, the microstructure found change significantly. Better properties at room temperature, i.e., increased remnant polarization (38% more) very low field switchability (225% less) observed for x 5% sample as...
Abstract Understanding magnetic domain wall (DW) dynamics is vital for improving the performance of heavy metal/ferromagnet based spintronic devices. Pd/Co/Pd multilayers hosting perpendicular anisotropy and interfacial Dzyaloshinskii‐Moriya interaction are prototypes high density memory This work presents creep regime DW in trilayers with Ta buffer layer excited by symmetric field‐induced motion using Kerr microscopy. A systematic increment velocity increasing Co thickness observed....
It is shown that Ca2+ doping at Bi-site results in the release of weak ferromagnetism BiFeO3. Structural transformation from rhombohedral to triclinic observed with 10% Ca doping. Raman measurements show presence oxygen vacancies and no evidence either intermediate valence or tetravalence iron Mössbauer measurements. No significant change Neel temperature The ferroelectric nature room indicates multiferroic Bi1−xCaxFeO3 (x=5% 10%) samples.
In this work a Mn doped magnetoelectric BiFeO3 system is studied. X-ray diffraction (XRD), scanning electron microscopy, energy dispersive x-ray analysis (EDX), Mössbauer spectroscopy at room and high temperatures, differential calorimetry (DSC), temperature magnetization, dielectric constant measurements photoelectron (XPS) are used to characterize the samples. The XRD result shows as major phase along with about 1–2% impurity phase. EDX equi-atomic ratio of Bi Fe site cations. Using DSC it...
Room temperature spontaneous magnetization and dielectric anomaly at Néel are observed in 15% Eu doped bismuth ferrite indicating the multiferroic nature of sample. With doping structural transformation from rhombohedral to triclinic is observed. Fe3+ Eu3+ oxidation states F57e E151u Mossbauer measurements, respectively. The high field spectrum longitudinal geometry shows an enhancement intensity lines corresponding Δm=0 transitions, i.e., second fifth six line pattern. This observation...
Herein, we present defect-induced photoluminescence behavior of Ga-doped ZnO (GZO) thin films with varying doping (Ga) concentrations and energetic ion irradiation. The were prepared by a sol-gel spin-coating method. Micro-photoluminescence (μ-PL) was carried out to investigate the defect-related emission variation concentration PL spectra revealed that all showed near-band-edge (NBE) along broad visible band, consisting violet, blue, green, yellow bands. intensity these bands found be...
We have studied the electronic and magnetic properties of BaTiO3 (BTO)/La0.7Sr0.3MnO3(LSMO) bilayer thin films deposited by pulse laser deposition on SrTiO3 (100) substrate. X-ray diffraction reciprocal space mappings show that grown bilayers are single phase epitaxial in nature. observed absorption study relative hybridization t2g orbitals Ti 3d with oxygen 2p decreases increasing Ti3+ fraction BTO layer. found anomalies magnetization versus temperature behaviour near structure transition...
We synthesized double perovskite Pr2FeCrO6 by solid-state method. Analysis of its X-ray powder diffraction shows that the compound crystallizes in a centrosymmetric structure with space group Pbnm. Our photoelectron spectroscopy (XPS) studies show all cations are present +3 oxidation state. Magnetization material is paramagnetic at room temperature and undergoes magnetic transition below TCM = 250 K. observe clear hysteresis loop, for example, 150 A low remnant magnetization Mr, ∼0.05 μB/f....
Intense research activities have been exploring the possibility of harnessing solar energy via photovoltaic and photocatalytic applications ferroelectric materials using built-in electric field for an efficient separation photoexcited charge carriers. However, one most important bottlenecks in these efforts is to find ferroelectricity suitably low-band-gap harvesting a sizable part spectrum, with known having band gaps larger than 2.5 eV. In present work, we show that chiral polar compound,...
Nickel−zinc ferrite (Ni0.58Zn0.42Fe2O4) nanoparticles with an average crystallite size of about 8.4 nm were synthesized by reverse micelle technique. Bulk sample was prepared annealing nickel−zinc (NZFO) at 1473 K. Room temperature Mössbauer spectra NZFO exhibit collective magnetic excitations, while annealed (bulk) particles have the ferrimagnetic phase. At 5 K, broad shape spectral lines for in comparison to bulk provide clear evidence a wide distribution fields acting Fe3+ nuclei...
Bismuth ferrite ceramics (BiFeO(3)) are multifunctional materials classified as multiferroics for their special magnetic and electric properties that can be modified by substitutional doping at the Bi and/or Fe sites. Understanding relation between magnetoelectric response structural/electronic modification upon is a relevant issue. In this work, structure of Eu-doped multiferroic systems (Bi(1-x)Eu(x)FeO(3), x = 0, 0.5, 0.1, 0.15) well valence state Eu ions have been investigated combining...
We report the role played by cation distribution in determining magnetic properties comparing dry gel, thermally annealed Ni ferrite prepared sol-gel auto-combustion technique. X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Mössbauer spectroscopy were used to characterize samples. Both XRD measurements validate formation of spinel phase with grain diameter 39.13−45.53 nm. First time antistructural modeling for is reported get...