A5086190309- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Ferroelectric and Piezoelectric Materials
- Electronic and Structural Properties of Oxides
- 2D Materials and Applications
- Photovoltaic System Optimization Techniques
- MXene and MAX Phase Materials
- Advanced DC-DC Converters
- Chalcogenide Semiconductor Thin Films
- Physics of Superconductivity and Magnetism
- X-ray Diffraction in Crystallography
- Graphene research and applications
- Advanced Steganography and Watermarking Techniques
- Induction Heating and Inverter Technology
- Advanced Thermoelectric Materials and Devices
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- User Authentication and Security Systems
- Acoustic Wave Resonator Technologies
- Thermal properties of materials
- Luminescence Properties of Advanced Materials
- Iron-based superconductors research
- Biometric Identification and Security
- Nuclear materials and radiation effects
Indian Institute of Science Education and Research, Bhopal
2017-2024
National Taiwan Normal University
2022-2024
Dr. Hari Singh Gour University
2024
Chaitanya Bharathi Institute of Technology
2023
Spin-phonon coupling, the interaction of spins with a surrounding lattice, is key parameter to understand underlying physics multiferroics and engineer their magnetization dynamics. Elementary excitations in multiferroic materials are strongly influenced by spin-phonon interaction, making Raman spectroscopy unique tool probe these coupling(s). Recently, it has been suggested that dielectric magnetic properties 15R-type hexagonal $\mathrm{BaMn}{\mathrm{O}}_{3}$ correlated through spin-lattice...
A two-dimensional honeycomb-structured magnet ${\mathrm{Ni}}_{2}{\mathrm{Te}}_{3}{\mathrm{O}}_{8}$ was synthesized, characterized, and comprehensively investigated for its intriguing physical properties. DC magnetization, specific heat, neutron diffraction revealed a long-range commensurate antiferromagnetic ordering at ${T}_{\mathrm{N}}\ensuremath{\sim}35\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ with propagation vector $\mathbf{k}=(100)$. The magnetic sublattice comprises stacking distorted...
Coupling of material properties provides new fundamental insights and possibilities toward multifunctional devices. The spinel structures display strong coupling between different order parameters, as a consequence, exhibiting many fascinating properties, such multiferroicity superconductivity. Here, we have investigated the structural, magnetic, vibrational mixed-spinel CoMn2O4 stabilized in distorted tetragonal evidenced from x-ray diffraction measurements. Magnetization measurements...
We have demonstrated the possibility to control otherwise robust magnetic properties of transition-metal phosphorus trisulfides ($\text{Mn/Fe}\text{/}\mathrm{NiP}{\mathrm{S}}_{3}$) in their heterostructures with Weyl semimetallic $\mathrm{Mo}{\mathrm{Te}}_{2}$ which can be attributed Dzyaloshinskii-Moriya (DM) interactions at interface two materials. While DM interaction is known scale strength spin-orbit coupling (SOC), we demonstrate using experiments on a variety substrates (underlayers)...
Atomically thin monolayers of graphene show excellent electronic properties which have led to a great deal research on their use in nanoscale devices. However, heat management such devices is essential order improve performance. Graphene supported hexagonal boron nitride (h-BN) substrate has been reported enhanced (opto)electronic and thermal as compared extensively used SiO2/Si graphene. Motivated by this, we performed temperature- power-dependent Raman Spectroscopic measurements four...
Investigating the competition between ferroelectric ordering and quantum fluctuations is essential for tailoring desired functionalities of mixed incipient systems, like, $(\mathrm{Ba},\mathrm{Sr})\mathrm{Ti}{\mathrm{O}}_{3}$ $(\mathrm{Eu},\mathrm{Ba})\mathrm{Ti}{\mathrm{O}}_{3}$ . Recently, it has been shown that suppression increases in since these phenomena are coupled to crystallographic phase transitions understand role phonons. Here, we observe unusual temperature dependence phonons...
Here we have investigated the role of electron phonon coupling on Raman spectrum narrow bandgap semiconductors APd3O4 (A = Ca, Sr) and hole-doped system Sr0.85Li0.15Pd3O4. Four active phonons are observed at room temperature for all three compounds as predicted by factor group analysis. The lowest energy (∼190/202 cm-1) associated with Pd vibrations is to exhibit an asymmetric Fano-like lineshape in compounds, indicating presence interaction between electronic continuum. origin continuum...
In the contemporary digital landscape, ensuring robust security measures is imperative to safeguard sensitive information and transactions. This work introduces an innovative Three-Level Authentication System that incorporates facial recognition, eye blink password, OTP (One-Time Password) generation enhance improve user experience. The initial level of authentication leverages advanced recognition technology. Employing sophisticated algorithms, system analyzes verifies unique features,...
ABSTRACT Sr 2 YRuO 6 is a material that provides an ideal platform for studying magnetic frustration in three‐dimensional geometries. Herein, we combine Raman spectroscopy and density functional theory calculations to establish connections between the lattice dynamics states single crystals. The x‐ray diffraction profiles reveal possesses ordered double‐perovskite structure with distorted monoclinic symmetry. Three phase transitions are observed linked presence of weak ferromagnetism at 135...
This article proposes a design of solar powered high step up non-isolated converter with low switching stress.The proposed circuit is designed by merging the traditional switched-inductor (SI) boost boosting cell.The new DC-DC made to control DC output renewable systems particularly for solar.The has various benefits such as providing efficiency, simplified control, voltage stress on active switches and step-up gain, which makes it suitable energy applications.Additionally, suggested...
Multiferroics are materials having more than one kind of ordering. Here, we have investigated the effect 3d transition metal doping at Ti site on structural and magnetic properties BaTiO3. The evolution crystal structure by different metals was analyzed X-ray diffraction Raman spectroscopic techniques. It observed that compounds with M = Mn, Co, Ni stabilized in single phase 6H-type hexagonal whereas for Fe Cr stabilize double (Tetragonal 6H), triple phases (Tetragonal, cubic respectively....
Materials which possess coupling between different degrees of freedom such as charge, spin, orbital and lattice are tremendous interest due to their potential for device applications. It has been recently realized that some manganite perovskite oxides show structural ferroelectric instabilities may be tuned by imposing internal or external strain. Among perovskites, AMnO3 (A = Ca, Sr Ba) reported good candidates spin-phonon driven multiferroicity. Here, we have probed the correlation...
Tailoring the quantum many-body interactions in layered materials through appropriate heterostructure engineering can result emergent properties that are absent constituent thus promising potential future applications. In this article, we have demonstrated controlling otherwise robust magnetic of transition metal phosphorus trisulphides (Mn/Fe/NiPS3) their heterostructures with Weyl semimetallic MoTe2 which be attributed to Dzyaloshinskii Moriya (DM) at interface two different materials....
Chemical dilution is an important parameter for tuning the electrical, vibrational, and magnetic properties of complex oxides. Pyrochlore titanates are known displaying a high level phonon anharmonicities which attributed to strong phonon-phonon anharmonic interactions. Therefore, these systems perfect hosts anharmonicity with external chemical pressure. Here, we present temperature-dependent Raman studies polycrystalline Dy2Ti2O7 its diluted analogues Dy1.9Sm0.1Ti2O7 Dy1.9La0.1Ti2O7. We...