A5071322645- Multiferroics and related materials
- Advanced Condensed Matter Physics
- Ferroelectric and Piezoelectric Materials
- Magnetic and transport properties of perovskites and related materials
- Dielectric properties of ceramics
- Physics of Superconductivity and Magnetism
- Topological Materials and Phenomena
- 2D Materials and Applications
- Iron-based superconductors research
Technische Universität Dresden
2024
Jawaharlal Nehru Centre for Advanced Scientific Research
2020-2023
Bhabha Atomic Research Centre
2012
Indian Institute of Technology Delhi
2012
The presence of superlattice reflections and detailed analysis the powder neutron x-ray diffraction data reveals that La rich BLF-PT (BFO0.50–LF0.50)0.50–(PT)0.50 has a ferroelectric rhombohedral crystal structure with space group R3c at ambient condition. Impedance spectroscopy, dielectric spectroscopy is subset impedance ac conductivity measurements were performed in temperature range 483 K ≤ T 573 to probe origin large remnant polarization frequency dependent broad transitions constant...
Combining ferroelectricity and magnetism in the same material remains a challenge because it involves complex crystal chemistry stringent symmetry requirements. In conventional ferroelectrics, polarization arises from second-order Jahn–Teller effect associated with cations of d0 or s2 lone pair electronic configuration. contrast, partially filled d f electrons. Materials that incorporate these two kinds different crystallographic sites exhibit multiferroic properties but weak coupling...
Abstract In the quest for 2D conducting materials with high ferromagnetic ordering temperature new family of layered Fe n GeTe 2 compounds, especially near‐room‐temperature ferromagnet 4 , receives a significant attention. features peculiar spin reorientation transition at T SR ≈ 110 K suggesting non‐trivial evolution magnetic anisotropy (MA)—one main contributors to stabilization order in low‐dimensional systems. An electron resonance (ESR) spectroscopic study reported here provides...
We present a high-resolution single crystal x-ray diffraction study of kagome superconductor ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$, exploring its response to variations in pressure and temperature. discover that at low temperatures, the structural modulations electronic superlattice, commonly associated with charge-density-wave order, undergo transformation around $p\ensuremath{\sim}0.7\text{ }\text{ }\mathrm{GPa}$ from familiar $2\ifmmode\times\else\texttimes\fi{}2$ pattern...
We report a comprehensive investigation of the structural, magnetic, and electrical properties in quasi-two-dimensional planar antiferromagnet ${\mathrm{BaNi}}_{2}{({\mathrm{PO}}_{4})}_{2}$, which crystallizes rhombohedral structure (space group $R\overline{3}$) consisting honeycomb layers ${\mathrm{Ni}}^{2+}$ ions. Magnetic susceptibility heat capacity data reveal long-range antiferromagnetic ordering ions at ${T}_{N}=24$ K. Interestingly, an applied magnetic field induces dielectric...
We report the magnetic and magnetoelectric properties of two isostructural polar compounds $\mathrm{Lu}M\mathrm{W}{\mathrm{O}}_{6}\phantom{\rule{4pt}{0ex}}(M=\mathrm{Fe}$ Cr) that were synthesized at high pressure temperatures. Both have a orthorhombic aeschynite-type structure (space group $Pna{2}_{1})$ with ordered ${M}^{3+}$ ${\mathrm{W}}^{6+}$ ions. Magnetization measurements show ${\mathrm{Fe}}^{3+}$ spins in $\mathrm{LuFeW}{\mathrm{O}}_{6}$ ${\mathrm{Cr}}^{3+}$...
We report the synthesis, structure, and magnetism-induced multiferroic properties of polar magnets $R\mathrm{FeW}{\mathrm{O}}_{6}$ (R = Tm, Sm, Gd, Er). All these compounds crystallize in orthorhombic structure with symmetry $Pna{2}_{1},$ which results from ordering ${\mathrm{Fe}}^{3+}$ ${\mathrm{W}}^{6+}$ ions at different crystallographic sites. DC magnetization specific heat measurements confirm antiferromagnetic order spins...
The structure and physical properties such as magnetization, heat capacity, dielectric constant of the polycrystalline Ba3NbFe3Si2O14 have been studied in detail. It is found to be structurally similar single crystal also has a antiferromagnetic transition at TN∼26 K. capacity measured temperature range 5 K–300 K shows peak 26 agreement with magnetic behavior. both function frequency, 10 Hz 1 MHz however exhibits two clear peaks ranges, 20 K–35 K, 40 K–125 which are dispersive nature. Both...
We report the experimental discovery of a new structural phase well-known orthorhombic R2BaCuO5 (R = Sm and Eu), exhibiting tetragonal crystal structure with space group P4∕mbm. The high-pressure is isostructural brown La, Pr, Nd). In this structure, Cu ions form an isolated square planar environment, contrary to phase, where are located in distorted pyramid. Magnetization specific heat measurements reveal long-range antiferromagnetic order Cu2+ and/or Sm3+ moments for Sm-sample, magnetic...
Co4Nb2O9 (CNO) having α-Al2O3 crystal structure with Co chains along c-direction shows gigantic magnetoelelctric coupling below antiferromagnetic ordering temperature of 27 K but above a spin flop field 1.6 T. We have investigated structural, magnetic and magnetoelectric properties Fe substituted (10% 20%) samples compared the parent one. In fact specific heat measurements revealed an additional transition 10 presence short range ~ 50 in as well samples. Linear ferroelectric behaviours are...