A5014763494- Magnetism in coordination complexes
- Advanced Condensed Matter Physics
- Organic and Molecular Conductors Research
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- Solid-state spectroscopy and crystallography
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Theoretical and Computational Physics
- Phase-change materials and chalcogenides
- Multiferroics and related materials
- Glass properties and applications
- Thermal properties of materials
- Chalcogenide Semiconductor Thin Films
- Rare-earth and actinide compounds
- Luminescence Properties of Advanced Materials
- Quantum, superfluid, helium dynamics
- Crystal Structures and Properties
- Advanced NMR Techniques and Applications
- Lanthanide and Transition Metal Complexes
- Electron Spin Resonance Studies
- High-pressure geophysics and materials
- Magnetic properties of thin films
- Graphene research and applications
- Thermodynamic and Structural Properties of Metals and Alloys
University of Pavol Jozef Šafárik
2015-2024
Institute of Physics of the Slovak Academy of Sciences
2015-2024
V. N. Karazin Kharkiv National University
2023
Slovak University of Agriculture in Nitra
2022-2023
American Physical Society
2023
Uzhhorod National University
2023
National Technical University "Kharkiv Polytechnic Institute"
2022
Institute of Electron Physics
2022
Vinnytsia National Technical University
2022
Institute of Nature Management
2022
Magnetocaloric properties of ${\text{KEr}({\mathrm{MoO}}_{4})}_{2}$ single crystals were investigated using magnetization and specific heat measurements in the magnetic field applied along easy hard axis. Large conventional magnetocaloric effect was found around 10 K ($\ensuremath{-}\mathrm{\ensuremath{\Delta}}{S}_{\mathrm{max}}=14$ J/kg for 5 T) What is more, a huge anisotropy $ab$ plane leads to large effect, $\ensuremath{-}\mathrm{\ensuremath{\Delta}}{S}_{\mathrm{R},\mathrm{max}}=10$ 13...
Proactive decision-making in all processes is difficult to imagine without forecasting methods, especially the field of cybersecurity where speed and quality response are often critical. For this reason, we proposed a unique methodology based on new hybrid architecture Transformer that perfectly captures long-term dependencies an adaptive algorithm ACWA quantifies historical patterns. Thus, described approach considers short-term fluctuations, trends, seasonal patterns more effectively than...
Results of ac-susceptibility, specific-heat, magnetization, and electron-spin-resonance studies a $[{\text{Gd}}_{2}{(\text{fum})}_{3}{({\text{H}}_{2}\text{O})}_{4}]\ensuremath{\cdot}3{\text{H}}_{2}\text{O}$ ($\text{fum}=\text{fumarate}$, ${\text{C}}_{4}{\text{H}}_{2}{\text{O}}_{4}$) powder samples are reported. The results these measurements enabled us to identify the studied compound as three-dimensional $S=7/2$ Heisenberg magnet with ${T}_{N}=0.19\text{ }\text{K}$ dominant crystal-field...
Specific-heat and susceptibility studies of powdered Ni(${\mathrm{C}}_{2}$${\mathrm{H}}_{8}$${\mathrm{N}}_{2}$${)}_{2}$Ni(CN${)}_{4}$ have been performed from 50 mK to 20 K, magnetization measurements conducted at 4.3 K in magnetic fields up 6 T. The results show that is an S=1 antiferromagnetic Heisenberg chain with a strong planar anisotropy. low-temperature specific-heat data contribution due excitations which are interpreted within the framework coupling theory (anti)excitons.
Exchange bias (EB) phenomena have been observed in Nd2/3Ca1/3MnO3 colossal magnetoresistance perovskite below the Curie temperature TC ∼ 70 K and attributed to an antiferromagnetic–ferromagnetic (FM) spontaneous phase segregated state of this compound. Field cooled magnetic hysteresis loops exhibit shifts toward negative direction field axis. The values exchange HEB coercivity HC are found be strongly dependent strength cooling Hcool. These effects evolution FM content a size clusters. A...
The first experimental evidence of the temperature crossover from magnetically wetting to nonwetting regime in a coherently and homogeneously precessing domain superfluid ${}^{3}\mathrm{H}\mathrm{e}\ensuremath{-}B$ is presented.
Phonon and electron spectra of metallic bigraphene are analyzed in the presence step-edge crystal imperfection. Different geometries considered. The dynamic planar stability considered structure is proved for temperatures above ambient. number phonon states shown to grow near K-point first Brillouin zone, compared pristine graphene. It found, that this type defects causes substantially nonuniform distribution pronounced increase with energies close Fermi energy can be expected spectrum...
Until recently, most data integration techniques involved central components, e.g., global schemas, to enable transparent access heterogeneous databases. Today, however, with the democratization of tools facilitating knowledge elicitation in machine-processable formats, one cannot rely on global, centralized schemas anymore as creation and consumption are getting more dynamic decentralized. Peer Data Management Systems (PDMS) provide an answer this problem by eliminating semantic component...
We perform analytical and numerical analysis of the electronic phonon spectrum evolution graphene during formation a boundary with “zigzag” chirality. It is determined, that excited gap wave has relativistic dispersion near Fermi level propagates along decays distance from it. Both properties considered. shown propagation occurs only atoms sub-lattice, which contains bonds broken formation. The forms narrow resonance peaks in local density states sublattice atoms. shown, on layer this...
Theoretical and experimental studies of a quasi-two-dimensional quantum antiferromagnet $\text{Cu}(\mathrm{en}){({\mathrm{H}}_{2}\mathrm{O})}_{2}{\mathrm{SO}}_{4}$ $(\mathrm{en}={\mathrm{C}}_{2}{\mathrm{H}}_{8}{\mathrm{N}}_{2})$ were performed. ab initio calculations exchange interactions confirmed that the system represents realization spatially anisotropic zigzag square lattice. Corresponding Monte Carlo thermodynamic quantities realized results applied in analysis susceptibility,...
A post-synthesis thermal treatment of metastable phases in the high-pressure stabilised perovskite BiFe1-yScyO3 system results irreversible formation polymorphs which represent novel polar and antipolar structures with interesting magnetic properties. Such annealing-stimulated polymorphism is believed to be a general phenomenon can found other systems.
NMR, EPR and magnetization measurements in Na$_x$CoO$_2$ for $0.65\leq x\leq 0.75$ are presented. While the signal arises from Co$^{4+}$ magnetic moments ordering at $T_c\simeq 26$ K, $^{59}$Co NMR originates cobalt nuclei metallic regions with no long range order characterized by a generalized susceptibility typical of strongly correlated systems. This phase separation insulating is argued to occur below $T^*(x)$ ($220 - 270$ K). Above $T^*$ an anomalous decrease intensity observed...
A novel polymeric one-dimensional compound Cu(tn)Cl2 (tn = 1,3-diaminopropane) was prepared and structurally characterized, its spectral, magnetic, thermodynamic, thermal properties were studied. The unique structure shows ladderlike chains composed of Cu(II) atoms chloro bridging ligands [Cu(-mu(3)-Cl-)Cu2] running along the crystallographic c axis. coordination geometry about copper (4 + 2) approximates that a strongly elongated octahedron. equatorial plane octahedron is formed by chelate...