A5011005354- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Solid-state spectroscopy and crystallography
- Magnetism in coordination complexes
- Phase-change materials and chalcogenides
- Physics of Superconductivity and Magnetism
- Multiferroics and related materials
- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Lanthanide and Transition Metal Complexes
- Crystal Structures and Properties
- Topological Materials and Phenomena
- Theoretical and Computational Physics
- Rare-earth and actinide compounds
- Iron-based superconductors research
- Material Dynamics and Properties
- Graphene research and applications
- Chalcogenide Semiconductor Thin Films
- Layered Double Hydroxides Synthesis and Applications
- Advanced NMR Techniques and Applications
- Optical properties and cooling technologies in crystalline materials
- Thermal Expansion and Ionic Conductivity
- Nuclear materials and radiation effects
- Magnetic Properties of Alloys
- Magnetic Properties and Synthesis of Ferrites
University of Pavol Jozef Šafárik
2014-2024
Charles University
2015-2024
Institute of Physics of the Slovak Academy of Sciences
2014-2024
Czech Academy of Sciences, Institute of Physics
2010-2023
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...
Many current research efforts in strongly correlated systems focus on the interplay between magnetism and superconductivity. Here we report coexistence of both cooperative ordered states recently discovered stoichiometric fully inversion symmetric heavy fermion compound Ce3PdIn11 at ambient pressure. Thermodynamic transport measurements reveal two successive magnetic transitions T1 = 1.67 K TN 1.53 into antiferromagnetic type states. Below Tc 0.42 enters a superconducting state. The large...
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,...
We present a first-principles study of the electronic, magnetic, and transport properties topological insulator ${\mathrm{Bi}}_{2}{\mathrm{Te}}_{3}$ doped with Mn atoms in substitutional $({\mathrm{Mn}}_{\mathrm{Bi}})$ interstitial van der Waals gap positions $({\mathrm{Mn}}_{i})$, which act as acceptors donors, respectively. The effect native ${\mathrm{Bi}}_{\mathrm{Te}}$- ${\mathrm{Te}}_{\mathrm{Bi}}$-antisite defects their influence on calculated electronic is also investigated. have...
Echoes of quantum phase transitions (QPTs) at finite temperatures are theoretically and experimentally challenging unexplored topics. Particularly in metallic ferromagnets the experimental investigations hampered by an intricate preparation sufficiently pure samples access to proper coordinates parameter space. The present study shows that it is possible tune a specific system easily accessible conditions vicinity its transition. physics demonstrated on Ru-doped UCoAl, driven pressure or...
Magnetotransport constitutes a useful probe to understand the interplay between electronic band topology and magnetism in spintronic devices. A recent theory of Lu Shen [Phys. Rev. Lett. 112, 146601 (2014)] on magnetically doped topological insulators predicts that quantum corrections $\mathrm{\ensuremath{\Delta}}\ensuremath{\kappa}$ temperature dependence conductivity can change sign across Curie transition. This phenomenon has been attributed suppression Berry phase surface states at Fermi...
The dynamic properties of the dipolar magnet CsGd(MoO4)2 have been studied. frequency and temperature dependence AC susceptibility investigated in paramagnetic region above 2 K revealed co-existence magnetic field induced slow fast relaxation channels with a timescale differing by three orders magnitude. is determined first coordination sphere Gd3+ ion has character two-phonon Orbach process. potentially attributed to Raman process realized via localized phonon mode associated layered...
Quantum Heisenberg chain and square lattices are important paradigms of a low-dimensional magnetism. Their ground states determined by the strength quantum fluctuations. Correspondingly, state rectangular lattice interpolates between spin liquid ordered collinear Néel with partially reduced order parameter. The diversity additional exchange interactions offers variety models derived from aforementioned paradigms. Besides spatial anisotropy coupling, controlling dimensionality ground-state...
Comparative analysis of experimentally measured Raman spectra crystalline (c), glassy (g), and powdered c‐As 2 S 3 samples is performed based on vibrational modes As 6 6+6/2 ring‐like nanoclusters being fully (“rigid”) or partially (“soft”) interconnected with the matrix, calculated using density functional theory (DFT). Although good agreement found in 100–500 cm −1 spectral range, DFT simulations show additional super‐low frequency “soft” rings at wavenumbers significantly lower than...
Magnetocaloric effect in the Haldane-gap $S=1$ spin-chain $[\mathrm{Ni}{({\mathrm{C}}_{2}{\mathrm{H}}_{8}{\mathrm{N}}_{2})}_{2}{\mathrm{NO}}_{2}]({\mathrm{BF}}_{4})$ was investigated at low temperatures $({k}_{B}T\ensuremath{\ll}J)$ and magnetic fields up to nominally $0.1{B}_{\mathrm{sat}}$, where $J$ ${B}_{\mathrm{sat}}$ denote an exchange interaction saturation field, respectively. Magnetic entropy found scale as $exp(\mathrm{\ensuremath{\Delta}}/{k}_{B}T)$ zero field ${T}^{0.67}$ for...
The thermal conductivity of CsGd(MoO4)2 has been studied in the temperature range from 2 to 50 K zero magnetic field.The analysis data performed within Debye model with relaxation-time approximation revealed presence scattering phonons by critical fluctuations.The behaviour phonon mean free path at lowest temperatures is discussed.
A multiple time scale relaxation dynamic is revealed by alternating current (ac) susceptibility studies of a single crystal $\mathrm{E}{\mathrm{r}}_{2}\mathrm{T}{\mathrm{i}}_{2}{\mathrm{O}}_{7}$ performed at high temperatures (${k}_{B}T\ensuremath{\gg}J/{k}_{B}$) in wide range static magnetic fields. An analysis the frequency dependence ac existence two mechanisms, identified as an Orbach process with pronounced effect phonon bottleneck and cross-tunneling. The origin attributed to resonant...