A5055573491- Rare-earth and actinide compounds
- Iron-based superconductors research
- Physics of Superconductivity and Magnetism
- High-pressure geophysics and materials
- Magnetic and transport properties of perovskites and related materials
- Crystallization and Solubility Studies
- Inorganic Chemistry and Materials
- Multiferroics and related materials
- 2D Materials and Applications
- Diamond and Carbon-based Materials Research
- Catalysis and Oxidation Reactions
- Heusler alloys: electronic and magnetic properties
- X-ray Diffraction in Crystallography
- Advanced Condensed Matter Physics
- Thermodynamic and Structural Properties of Metals and Alloys
- Advancements in Battery Materials
- Topological Materials and Phenomena
- Chemical Synthesis and Characterization
- ZnO doping and properties
- Superconducting Materials and Applications
- Dielectric properties of ceramics
- Thermal Expansion and Ionic Conductivity
- Superconductivity in MgB2 and Alloys
- Advanced Thermoelectric Materials and Devices
- Magnetic Properties and Synthesis of Ferrites
Bharathidasan University
2017-2024
Elettra-Sincrotrone Trieste S.C.p.A.
2022
We explore the structural, magnetic, vibrational and optical band gap properties under varying pressures. By integrating first-principles calculations with experimental techniques, including Raman spectroscopy, photoluminescence (PL), uniaxial pressure studies (thermal expansion), magnetization measurements, we unveil intricate pressure-induced transformations in Fe-doped CrCl3, shedding light on its electronic, magnetic evolution. At ambient pressure, spectra confirm all expected...
Abstract We report here on the complex magnetic structure and magnetocapacitance in NiF 2 , a non-oxide multifunctional system. It undergoes an anti-ferromagnetic transition near 68.5 K, superimposed with canted Ni spin driven weak ferromagnetic ordering, followed by metastable phase at or below 10 K. Our density functional calculations account for of deduced from temperature field dependent measurements. Near room temperature, exhibits relatively large dielectric response reaching >10 3...
The impact of hydrostatic pressure (P) up to 1 GPa on T c , J and the nature pinning mechanism in FexNbSe2 single crystals have been investigated within framework collective theory. We found that can induce a transition from regime where is controlled by spatial variation critical temperature (δT ) mean free path (δℓ). Furthermore, low field are slightly induced, although drops more rapidly at high fields than ambient P. effect enhances anisotropy reduces coherence length, resulting weak...
We present structural properties at different temperatures and high‐pressure (HP) of La3Rh4Sn13 which is one the interesting systems in Remika phase RE3Rh4Sn13 (RE = Sr, Ca, La, Pr, Ce) quasi‐skutterudite series using synchrotron diffraction. Data ambient conditions revealed presence several weak reflections, could be accounted only with a superlattice I* structure (I4132) lattice parameter ~19.457 Å. However, above 350 K, complete suppression reflections observed. higher found to well...
Hydrostatic pressure response of $\mathrm{LaAu}{\mathrm{Sb}}_{2}$ charge density wave (CDW) system is investigated using electrical transport, x-ray diffraction (XRD), and density-functional theory (DFT). Resistivity data at ambient evidence a clear CDW transition 83 K. X-ray reveals that in plane out axes show opposite behavior with decreasing temperature, particular, $c$ axis develops distinct change \ensuremath{\sim}250 K, much above the observed The shifts to low temperature increasing...
Herein, the transport properties of Sr 3 Rh 4 Sn 13 , Ca and La quasi‐skutterudites are studied which show sharp superconducting (SC) transition with a temperature, T c ≈4.7, ≈8, ≈2 K, respectively. In system, electrical resistivity data evidence pronounced anomaly before SC at * ≈136 K. No such anomalies observed in other two systems. Detailed structural investigations using synchrotron single‐crystal powder diffraction reveal that these systems have cubic structure being PmPmn space group...
Sc5Rh6Sn18with a cage-type quasiskutterudite crystal lattice and type II superconductivity, with superconducting transition temperatureTc= 4.99 K, was investigated under hydrostatic high-pressure (HP) using electrical transport, synchrotron x-ray diffraction (XRD) Raman spectroscopy. Our data show that HP enhance the metallic nature andTcof system.Tcis found to continuous increase reaching 5.24 K at 2.5 GPa. Although system is in nature, spectroscopy investigations ambient pressure revealed...
It is widely believed that the origin of a significant cause for voltage and capacity fading observed in lithium (Li)-ion batteries related to structural modifications occurring cathode material during Li-ion insertion/de-insertion process. The mechanism resulting changes are known exert severe strain on lattice, consequently leading performance degradation. Here, with view shed more light effect such properties material, we have systematically investigated pressure dependence transport an...
We report a pressure-induced enhancement of the superconducting transition temperature (Tc) in non-centrosymmetric (NCS) compound, LaPtGe. With pressure, till 3 GPa, we observed modest Tc with rate 0.071 K/GPa. However, above this showed ~2.5 times increase, 0.183 3.94 K at 6 highest pressure value used our transport study. Synchrotron high-pressure x-ray powder diffraction (HP-XRPD) measurements do not reveal any structural phase system range. it an apparent change slope dependence lattice...
We report here the phase diagrams of EuCoGe3 and EuRh2In8 studied by ac calorimetry under pressure using a diamond anvil cell. exhibits two antiferromagnetic transitions at TN = 15 K \(T'_{\text{N}} 13.4\) K. With increasing \(T'_{\text{N}}\) increase orders persist up to high pressure. A semi quantitative analysis dependence specific heat does not show any large changes, but is compatible with moderate enhancement effective mass for EuCoGe3. The transition temperature initially increases...
A systematic synchrotron high‐pressure X‐ray powder diffraction study of Mn 3 Sn up to 9 GPa is reported. In this pressure range, the crystal symmetry remains in hexagonal P6 /mmc space group, with a continuous reduction lattice parameters. Analysis indicates that system may have different magnetic ground state above 4 due varying local atomic interactions. This brought about by slightly compression rate for in‐plane ‐ and out‐of‐plane c ‐axis, respectively, ≈−0.0235 ≈−0.0176 Å −1 . The...
We have investigated the pressure (