A5053784437- Rare-earth and actinide compounds
- Magnetic Properties of Alloys
- Magnetic and transport properties of perovskites and related materials
- Magnetic properties of thin films
- Nuclear physics research studies
- Muon and positron interactions and applications
- Magnetic Properties and Applications
- High-pressure geophysics and materials
- Intermetallics and Advanced Alloy Properties
- Physics of Superconductivity and Magnetism
- Magnetic Properties and Synthesis of Ferrites
- Advanced Chemical Physics Studies
- Metallic Glasses and Amorphous Alloys
- Atomic and Molecular Physics
- Heusler alloys: electronic and magnetic properties
- Iron oxide chemistry and applications
- Iron-based superconductors research
- Advancements in Battery Materials
- Solid-state spectroscopy and crystallography
- Thermodynamic and Structural Properties of Metals and Alloys
- Metallurgical and Alloy Processes
- Mesoporous Materials and Catalysis
- Advanced Thermoelectric Materials and Devices
- Shape Memory Alloy Transformations
- Boron and Carbon Nanomaterials Research
Maria Curie-Skłodowska University
2014-2023
Institute of Physics
2009-2023
Lomonosov Moscow State University
1983-2015
Institute for High Pressure Physics
2015
Lublin University of Technology
1993
Czech Academy of Sciences, Institute of Physics
1984-1993
Marie Curie
1987
Joint Institute for Nuclear Research
1983
Moscow State University
1983
Abstract Small particles of magnetite, i.e. 7.5, 13.4 and 14.1 nm in diameter, were obtained by the method co-precipitation. The crystal structure size distributions determined means transmission electron microscopy X-ray diffraction. magnetic properties nanoparticles tested Mössbauer spectroscopy within temperature range from 3 K to room (RT). study reveals relaxation behaviour related existence superparamagnetic phase. blocking depends on sizes ammonia concentration.
Abstract The paper presents the investigation of magnetic nanoparticles (MNPs) dedicated to hyperthermia application. crystal structure and size distributions have been determined by means transmission electron microscope (TEM) X-ray diffraction (XRD). Magnetic properties were tested Mössbauer spectroscopy together with calorimetric experiments. spectroscopic study MNPs revealed existence a superparamagnetic phase. relative contribution relaxing component total spectrum at room temperature...
Using time-differential perturbed angular correlation spectroscopy we have measured the electric field gradient (EFG) at $^{111}\text{C}\text{d}$ probe nuclei in solid Ce a pressure range up to 8 GPa. Covering various allotropic phases of Ce, find that value EFG cubic $\ensuremath{\alpha}$ phase is almost four times larger than $\ensuremath{\gamma}$ and close values noncubic ${\ensuremath{\alpha}}^{\ensuremath{'}}$ ${\ensuremath{\alpha}}^{\ensuremath{''}}$. These results together with...
Abstract Nanoparticles of manganese ferrite were obtained by the impregnation highly ordered mesoporous MCM-41 silica support. The investigated sample contained 20% wt. Fe. nanocrystallites strongly dispersed in matrix and their size was about 2 nm. annealing at 500°C led to increase particle 5 Mössbauer spectroscopy investigations performed room temperature show on occurrence MnFe O 4 nanoparticle superparamagnetic state for annealed all temperatures. coexistence ferromagnetic phase...
The specimens of Fe1-xCox alloys obtained by electrodeposition onto graphite were tested Mossbauer spectroscopy and X-ray diffraction. Two structural transformations from the body-centred cubic to face-centred further hexagonal, as Co concentration increases, observed. How hyperfine field depends on occupancies 3d 4s states was deduced. Changes in preferred direction domain magnetization caused variable have also been
The quadrupole interaction at $^{111}\mathrm{Cd}$ impurity nuclei in the intermediate-valence compound $\mathrm{Yb}{\mathrm{Al}}_{2}$ has been measured under pressure up to $80\phantom{\rule{0.3em}{0ex}}\mathrm{kbar}$ by time-differential perturbed angular correlation spectroscopy. It was found that frequency ${\ensuremath{\nu}}_{Q}$ on located Al sites varies nonlinearly and increases almost four times with increase $80\phantom{\rule{0.3em}{0ex}}\mathrm{kbar}$. A linear between mean Yb...
Temperature dependencies of the electrical resistivity, magnetic susceptibility, and heat capacity have been obtained in cubic phase ${\mathrm{TbGe}}_{2.85}$ (the ${\mathrm{AuCu}}_{3}$ structure), synthesized at high pressure. The macroscopic measurements indicate that a charge density wave is formed below 145 K an antiferromagnetic ordering realized 19 K. Hyperfine interaction data with time differential perturbed angular correlation method $^{111}\mathrm{Cd}$ probes inserted lattice...
Structural phase transformations and magnetic properties of mesoporous MCM-41 template modified with iron nickel salts were studied by nitrogen physisorption, X-ray diffraction, Mössbauer spectroscopy transmission electron microscopy.The FeNi-oxide or the bimetallic crystal structure is formed for low high Ni concentrations, respectively.The average size nanoparticles about 10 nm.About 70% particles exist in a superparamagnetic state at room temperature.
Abstract The Nd 2 Fe 14 B cylindrical magnets were treated with water solutions of alkali, acid, and salt. Mössbauer spectroscopy was applied to study the composition properties surface material magnets. It is shown that main phase permanent magnet partly decomposes. released α-Nd at grain boundaries interacts forms neodymium hydroxide matrix, diffuses into it. presence Fe-Nd(OH) 3 reflected in paramagnet doublet spectra
Abstract The hyperfine magnetic field at 181 Ta in the ferromagnetic intermetallic Laves compound (Y 0.97 Hf 0.03 ) Fe 2 is measured by perturbed angular correlation method. A value H hf (Ta) = –14.4 T obtained 300 K. temperature dependence of this field, range from 78 K up to and above, Curie point, shown be different that bulk magnetization.