A5086086059- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Iron oxide chemistry and applications
- Magnetic Properties and Synthesis of Ferrites
- Physics of Superconductivity and Magnetism
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Clay minerals and soil interactions
- Rare-earth and actinide compounds
- Gas Sensing Nanomaterials and Sensors
- Magnetic properties of thin films
- Iron-based superconductors research
- Electronic and Structural Properties of Oxides
- Minerals Flotation and Separation Techniques
- Magnetism in coordination complexes
- Solid-state spectroscopy and crystallography
- Magnetic Properties of Alloys
- Theoretical and Computational Physics
- Crystallography and molecular interactions
- Ferroelectric and Piezoelectric Materials
- Shape Memory Alloy Transformations
- Molecular spectroscopy and chirality
- Organic and Molecular Conductors Research
- Liquid Crystal Research Advancements
UGC DAE Consortium for Scientific Research
2011-2025
Max Planck Institute for Solid State Research
2019-2025
Tata Institute of Fundamental Research
2017-2024
Institute for Basic Science
2018-2022
Stuttgart Observatory
2019
University of Mumbai
2019
Seoul National University
2018
Indian Institute of Science Education and Research Thiruvananthapuram
2013-2015
Devi Ahilya Vishwavidyalaya
2010-2014
Vigyan Prasar
2011
Recently, transition metal phosphates (TMPs) are demonstrated as promising candidates for supercapacitors due to their good conductivity and long-term stability. Herein, we have inrtoduced cobalt cyclotetraphosphate (Co2P4O12) novel supercapacitive electrode material, which deliver a capacitance of 437 F/g with stability over 3000 cycles (around 90%). To display the practical relevance, fabricated asymmetric device using activated carbon Co2P4O12 negative positive electrodes, respecitvely,...
Solid-state ceramic technique route is used for synthesizing Cr-doped haematite α-Fe2−xCr x O3 (x = 0, 0.125, 0.50 and 1) samples. Single phase corundum (Al2O3) type structure revealed from the X-ray diffraction (XRD) patterns. The Raman spectra of illustrate seven phonon modes. On substitution Cr at Fe site, all active modes are shifted to higher wave numbers. coercivity remanence haematites increase as increases. increased samples can be attributed their enhanced shape magneto-crystalline...
Abstract In the field of quantum materials, understanding anomalous behavior under charge degrees freedom through bond formation is fundamental importance, with two key concepts: Dimerization and order at different cation sites. The coexistence both dimerization ordering unusually found in NaRu2O4, even its metallic state room temperature. Our work unveils origin interplay these effects within single-crystalline NaRu2O4. Employing advanced transmission electron microscopy techniques, we...
The anisotropic light-matter interactions in 2D materials have garnered significant attention for their potential to develop futuristic polarization-based optoelectronic devices such as photodetectors and photoactuators. In this study, we investigate the polarization-dependent ferroelectric 3R α-In2Se3 using Angle-Resolved Polarized Raman Spectroscopy with different excitation lasers. Our experimental findings supported by complementary Density Functional Theory calculations demonstrate that...
We report static and dynamic properties of the antiferromagnetic compound ${\mathrm{Zn}}_{2}(\mathrm{VO})({\mathrm{PO}}_{4}){}_{2}$, consequences nonmagnetic ${\mathrm{Ti}}^{4+}$ doping at ${\mathrm{V}}^{4+}$ site. ${}^{31}\mathrm{P}$ nuclear magnetic resonance (NMR) spectra spin-lattice relaxation rate $(1/{T}_{1})$ consistently show formation long-range order below ${T}_{N}=3.8\text{--}3.9$ K. The critical exponent $\ensuremath{\beta}=0.33\ifmmode\pm\else\textpm\fi{}0.02$ estimated from...
The phenomenon of temperature induced magnetization-reversal, giving rise to negative magnetization (NM) in several rare-earth chromates, has been revisited through studies on $\mathrm{G}{\mathrm{d}}_{1\ensuremath{-}x}{\mathrm{Y}}_{x}\mathrm{Cr}{\mathrm{O}}_{3}$. study re-examines the well accepted explanation NM, i.e., antiparallel polarization paramagnetic $({\mathrm{R}}^{3+})$ moments against weak $({M}_{\mathrm{Cr}})$ canted antiferromagnetically ordered $\mathrm{C}{\mathrm{r}}^{3+}$...
We present a detailed investigation of the lattice vibrations and magnetic properties spin-$\frac{1}{2}\phantom{\rule{4pt}{0ex}}\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{Cu}}_{2}{\mathrm{V}}_{2}{\mathrm{O}}_{7}$ system by means x-ray diffraction (XRD), susceptibility, specific heat, absorption spectroscopy (XAS), photoelectron (XPS), Raman scattering measurements along with phonon structure calculations density-functional theory (DFT). Thermodynamic show long-range ordered (LRO) state...
We report a comprehensive investigation of the crystal structure and magnetic behavior $S=1$ compound ${\mathrm{Ba}}_{2}\mathrm{Ni}{({\mathrm{PO}}_{4})}_{2}$ with honeycomblike topology spin lattice. Magnetic susceptibility specific-heat data reveal two successive transitions at ${T}_{N1}=5\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ ${T}_{N2}=4.6\phantom{\rule{0.28em}{0ex}}\mathrm{K}$. Additionally, these demonstrate broad peak ${T}_{max}\ensuremath{\sim}8\phantom{\rule{0.28em}{0ex}}\mathrm{K}$,...
Magnetic susceptibility and heat capacity of three manganese based structures are measured modeled with one-dimensional antiferromagnetic chains.
We report the results of dc resistivity, ac susceptibility, and thermopower study partial substitution at Y (A site by Ca) Cu (B Ni) polycrystalline superconductors. The iodometric analysis reveals that oxygen deficiency,δ,for YBa2Cu3O7-δ(S-I),Y0.9Ca0.1 Ba2Cu3O7-δ(S-II),Y0.8Ca0.2Ba2Cu3O7-δ(S-III) Y0.9Ca0.1 Ba2(Cu0.99Ni0.01)3O7-δ(S-IV) samples are 0.16, 0.30, 0.39 0.29 respectively. x-ray powder diffraction pattern indicates all in orthorhombic phase. susceptiblity measurements shows divalent...
Using Raman spectroscopy to study the correlated <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>4</a:mn><a:mi>d</a:mi></a:mrow></a:math>-electron metal <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:msub><c:mrow><c:mi>Sr</c:mi></c:mrow><c:mrow><c:mn>2</c:mn></c:mrow></c:msub></c:mrow><c:mrow><c:msub><c:mrow><c:mi>RhO</c:mi></c:mrow><c:mrow><c:mn>4</c:mn></c:mrow></c:msub></c:mrow></c:math>, we observe pronounced...
Two stable nitronyl nitroxide free radicals {R1 = 4′-methoxy-phenyl-4,4,5,5,-tetramethylimidazoline-1-oxyl-3-oxide (NNPhOMe) and R2 2-(2′-thienyl)-4,4,5,5-tetramethylimidazoline 3-oxide 1-oxyl (NNT)} are successfully synthesized using Ullmann condensation. The reactions of these two with 3d transition metal ions, in the form M(hfac)2 (where M Co or Mn, hfac: hexafluoroacetylacetone), result four metal–organic complexes Co(hfac)2(NNPhOMe)2, 1; Co(hfac)2(NNT)2·(H2O), 2;...
Ti doped hematite α-Fe2−xTi x O3 (x = 0.0, 0.0206 and 0.0344) samples are synthesized using solid-state ceramic route technique. Single phase corundum (Al2O3) type structure is revealed from the X-ray diffraction (XRD) pattern. On substitution of at Fe site, all Raman active modes shifted to higher wave numbers. An additional feature E u (LO) mode about 660 cm-1 observed. The frequency decreased pronounced systematically as a function doping, it reaches value 658 cm−1 for 0.0344. coercivity...
(Right) EPR spectrum of TmFeO<sub>3</sub> from 20–300 K. (Left) (a) Asymmetry behavior w.r.t. temperature (K), (b) Δ<italic>H</italic><sub>pp</sub><italic>vs. T</italic>, (c) Plot as ln(Δ<italic>H</italic><sub>pp</sub> × <italic>T</italic>) <italic>vs.</italic> 1000/<italic>T</italic>, (d) DIN (inset represents <italic>χ</italic><sub>dc</sub><italic>vs. T</italic> at different temperatures).
The structure of ${\mathrm{K}}_{2}{\mathrm{Ni}}_{2}{({\mathrm{MoO}}_{4})}_{3}$ consists $S=1$ tetramers formed by ${\mathrm{Ni}}^{2+}$ ions. magnetic susceptibility $\ensuremath{\chi}(T)$ and specific heat ${C}_{P}(T)$ data on a single crystal show broad maximum due to the low dimensionality system with short-range spin correlations. A sharp peak is seen in at about 1.13 K, well below maximum. This an indication long-range order, i.e., absence gap ground state. Interestingly, application...
Abstract Collective excitations such as plasmons and paramagnons are fingerprints of atomic-scale Coulomb exchange interactions between conduction electrons in metals. The strength range these interactions, which encoded the excitations’ dispersion relations, primary interest research on origin collective instabilities superconductivity magnetism quantum materials. Here we report resonant inelastic x-ray scattering experiments correlated 4 d -electron metal Sr 2 RhO , reveal a spin-orbit...
Using hybrids and photon illumination together is an important step toward making high-performance gas sensors. Hybrid materials have their own properties that can improve the way sensors work, make sensor more sensitive. There currently a lack of understanding regarding impact photoassisted sensing hybrid materials, it imperative connection between light photons heterostructures for be clarified. In this article, we design develop molybdenum disulfide (MoS2) based with low detection limit...
One-dimensional magnets, where spins interact only along a particular spatial direction, are of special interest due to their quantum mechanical behaviors, <italic>viz</italic>., spin liquid, glass, phase transition, even superconductivity <italic>etc</italic>.