A5031935052- Magnetic properties of thin films
- Magnetic Properties and Synthesis of Ferrites
- Magnetic and transport properties of perovskites and related materials
- 2D Materials and Applications
- Multiferroics and related materials
- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Electron and X-Ray Spectroscopy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear Physics and Applications
- Semiconductor materials and devices
- Magnetic Properties and Applications
- Perovskite Materials and Applications
- Iron oxide chemistry and applications
- Graphene research and applications
- ZnO doping and properties
- Electronic and Structural Properties of Oxides
- Magneto-Optical Properties and Applications
- MXene and MAX Phase Materials
- Integrated Circuits and Semiconductor Failure Analysis
- Semiconductor materials and interfaces
- Ferroelectric and Piezoelectric Materials
- Ion-surface interactions and analysis
- Theoretical and Computational Physics
- Rare-earth and actinide compounds
Pandit Bhagwat Dayal Sharma Post Graduate Institute of Medical Sciences
2025
Panjab University
2015-2024
Centre de Nanosciences et de Nanotechnologies
2020-2023
Dolphin (PG) Institute of Bio Medical and Natural Science
2021
University of Petroleum and Energy Studies
2021
Bhabha Atomic Research Centre
2021
University of Delhi
2021
Chandigarh University
2020
Trinity College Dublin
2005-2014
Inter-University Accelerator Centre
1998-2002
If they could be easily exfoliated, layered materials would become a diverse source of two-dimensional crystals whose properties useful in applications ranging from electronics to energy storage. We show that compounds such as MoS(2), WS(2), MoSe(2), MoTe(2), TaSe(2), NbSe(2), NiTe(2), BN, and Bi(2)Te(3) can efficiently dispersed common solvents deposited individual flakes or formed into films. Electron microscopy strongly suggests the material is exfoliated layers. By blending this with...
Abstract There is an emergent demand for high-flexibility, high-sensitivity and low-power strain gauges capable of sensing small deformations vibrations in extreme conditions. Enhancing the gauge factor remains one greatest challenges sensors. This typically limited to below 300 set when sensor fabricated. We report a strategy tune enhance sensors based on Van der Waals materials by tuning carrier mobility concentration through interplay piezoelectric photoelectric effects. For SnS 2 we up...
SnSe2 is an anisotropic binary-layered material with rich physics, which could see it used for a variety of potential applications. Here, we investigate the gas-sensing properties using first-principles calculations and verify predictions gas sensor made few-layer grown by chemical vapor deposition. Theoretical simulations indicate that electrons transfer from to NO2, whereas direction charge opposite NH3. Notably, flat molecular band appears around Fermi energy after NO2 adsorption induced...
Studies of the angular dependence anisotropic magnetoresistance (AMR) are reported for epitaxial films magnetite $({\text{Fe}}_{3}{\text{O}}_{4})$ grown on MgO(001) and also single crystals magnetite. The characteristic feature AMR is a twofold symmetry at temperatures above 200 K. As samples cooled below K, an additional set peaks appears. These become dominant lower showing overall fourfold symmetry. Observation anisotropy in points to formation charge ordering much greater than Verwey...
Magnetization studies on well characterized epitaxial magnetite $({\text{Fe}}_{3}{\text{O}}_{4})$ thin films grown MgO(100) show that the ultrathin ($<5\text{ }\text{nm}$ thickness) are ferromagnetic and their magnetic moments much greater than those of bulk magnetite, particularly at a thickness 20 nm or below. The observation nature in $(<5\text{ }\text{nm})$ is contrast to previously accepted dead layer interface model superparamagnetic behavior for magnetite. From detailed spin-polarized...
We observe a strong crystallographic direction dependence on the low-field magnetoresistance (MR) behavior of epitaxial Fe${}_{3}$${\mathrm{O}}_{4}$ (110) films grown MgO substrates. The sign MR is positive when current and field are parallel to [001], whereas along $[\stackrel{\underline{}}{1}10]$ its negative, similarly that commonly observed for (100) oriented films. relate this effect presence antiphase boundaries (APB) subsequent reduction in width canted spin structure vicinity, due...
van der Waals heterojunctions with tunable polarity are being actively explored for more Moore and more-than-Moore device applications, as they can greatly simplify circuit design. However, inadequate control over the multifunctional operational states is still a challenge in their development. Here, we show that vertically stacked InSe/SnS2 heterojunction exhibits type-II band alignment, its be tuned by an external electric field wavelength intensity of illuminated light source. Moreover,...
This study is aimed to reveal that in this digital world where there a stiff competition among brands, every brand wants be market leader by keeping the current trends their mind. Currently, Korean wave most shinning trend across globe. One of its evidence buzz created recent web series – Squid Game worldwide. article themed on idea has got attention not only viewers but also various brands and Netflix too. By looking at popularity both have jumped into advertisement with marketing...
Contemporary brands are leaving no stone unturned to enhance their brand visibility among Gen Z (Generation – Zoomers) consumers. Z’s known for tech-savviness and preference authentic, engaging content. Currently, they forming the largest chunk of Indian population. market is full close substitutes that’s why every wants take first mover advantage by using current available trends. In today's contemporary digital world across globe constantly seeking innovative ways connect with Z. One...
Abstract Introduction: Diabetes mellitus is a chronic disorder involving the metabolic system of blood glucose. Its progression involves micro and macro circulation body, affecting heart, kidneys, retina, peripheral vessels, nerves. Developing countries like India have high burden diabetic neuropathy (DPN). The aim this study was to screen for DPN using validated tool, Michigan Neuropathy Screening Instrument (MNSI), identify determinants symptoms. Methodology: A total 175 diabetics with...
This study is aimed to reveal that in this new age, the consumer more environment conscious. Modern prefers those products which are having less environmental harm or tend protect for future generations as well. changed consumption pattern has made opportunity Indian start-ups jump into market with affable friendly products. The age start- ups discussed were founded on after year 2010. These can also be termed green start – ups. In study, various offering been covered. working eco advocates...
We have investigated the interlayer exchange coupling between epitaxial spinel Fe3O4 layers across an insulating nonmagnetic MgO spacer. The structure used for these investigations was (10nm)∕MgO (0.8–3nm)∕Fe3O4 (10nm)∕NiO (15nm) multilayers grown on (100) substrates. find that two are antiferromagnetic coupled through spacer when thickness is less than 1.5nm. Furthermore, ab initio calculation of IEC Fe∕MgO∕Fe indicates importance electrode states, in particular, partial oxidation...
Strain relaxation studies in epitaxial magnetite, ${\text{Fe}}_{3}{\text{O}}_{4}$, thin films grown on ${\text{MgAl}}_{2}{\text{O}}_{4}$(100) substrates are reported. The study shows that the were relaxed line with theoretical model prediction a critical thickness, ${t}_{\text{c}}=5\text{ }\text{nm}$. Antiphase boundaries (APBs) not expected to form ${\text{Fe}}_{3}{\text{O}}_{4}$ ${\text{MgAl}}_{2}{\text{O}}_{4}$ because both film and substrate have same crystal symmetry. In contrast, our...
The magnetoresistance (MR) behavior of epitaxial magnetite ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ grown on low-vicinal (small miscut) and high-vicinal (large MgO substrates is compared. Magnetization measurements films showed reduced magnetic moment as compared with the MgO, which correlates well expected reduction in due to step edge induced additional antiphase boundaries (APBs) out-of-plane shift vectors. MR significantly higher (12.3% at $2\phantom{\rule{0.3em}{0ex}}\mathrm{T}$) for a...
Strain relaxation studies in epitaxial magnetite (Fe3O4) thin films grown on MgO (100) substrates using high-resolution x-ray diffraction and cross-sectional transmission electron microscopy reveal that the remain fully coherent up to a thickness of 700nm. This is much greater than critical tc for strain estimated from mismatch strain. Anomalous behavior Fe3O4∕MgO heteroepitaxy attributed reduction effective stress experienced by film due presence antiphase boundaries (APBs) enable maintain...
Monolayer MoSe2 is a transition metal dichalcogenide with narrow bandgap, high optical absorbance and large spin-splitting energy, giving it great promise for applications in the field of optoelectronics. Producing monolayer films reliable scalable manner still challenging task as conventional chemical vapor deposition (CVD) or exfoliation based techniques are limited due to small domains/nanosheet sizes obtained. Here, on NaCl assisted CVD, we demonstrate simple stable synthesis...
Epitaxial films of La0.7Ca0.3MnO3 have been irradiated with 90 MeV oxygen ions at different dose values ranging from 1011–1014 ions/cm2. The structural, magnetization, and magnetotransport properties studied as a function the ion dose. It is found that change gradually up to 1013 ions/cm2; however, drastic changes occur when sample higher 1014 Specifically, this exhibits large, nearly temperature independent magnetoresistance in low regime. Rutherford backscattering channeling data bring out...
The effect of swift heavy ion (SHI) irradiation (190MeVAg) on structural, electrical transport and magnetic properties epitaxial magnetite (Fe3O4) thin films (thickness ∼70nm) grown MgO⟨100⟩ oriented substrate have been investigated. x-ray diffraction shows that at low fluence values up to 5×1011ions∕cm2, the strain in is relaxed, whereas, higher range 1×1012–1×1013ions∕cm2, relationship with lost along a phase transformation from more oxidized (i.e., maghemite). Verwey transition...
We present the structural, dielectric and magnetization study of single phase polycrystalline BixCo2−xMnO4 (0⩽x⩽0.3), synthesized by a conventional solid state route. All samples have cubic spinel structure with Fd3m space group. Bi-substitution in Co2MnO4 stabilizes ferroelectric transition at temperature ∼350K enhances constant relaxor behavior. The capacitance-voltage (C-V) measurements confirm nature room temperature. Ferrimagnetic is preserved Bi-substituted samples. Magnetocapacitive...