A5064037894- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- Electronic and Structural Properties of Oxides
- High-pressure geophysics and materials
- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Theoretical and Computational Physics
- Metallic Glasses and Amorphous Alloys
- Phase-change materials and chalcogenides
- ZnO doping and properties
- Chemical and Physical Properties of Materials
- Glass properties and applications
- Magneto-Optical Properties and Applications
- Magnetic properties of thin films
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Diamond and Carbon-based Materials Research
- Material Science and Thermodynamics
- Magnetic Properties of Alloys
- X-ray Spectroscopy and Fluorescence Analysis
- Gas Sensing Nanomaterials and Sensors
- Thermodynamic and Structural Properties of Metals and Alloys
- Dust and Plasma Wave Phenomena
- Surface Roughness and Optical Measurements
Donetsk National Technical University
2004-2021
National Academy of Sciences of Ukraine
1999-2020
Donetsk Institute for Physics and Engineering named after O.O. Galkin
1992-2019
National Academy of Sciences
1998
Physico-Technical Institute
1984-1989
M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine
1980
N.N. Krasovskii Institute of Mathematics and Mechanics of the Ural Branch of the Russian Academy of Sciences
1979
National Research Tomsk State University
1973-1979
Pulsed laser deposition of high Tc compounds onto unheated substrates, resulting in amorphous thin films, preserves to a great extent the composition matter ejected from target. This is primary interest, both for understanding dynamics laser–target interaction and practical (optimization) reasons. We have investigated structure crystalline YBaCuO films obtained on-axis off-axis geometries, correlated results with optical transport properties these films. X-ray scattering reveals existence...
The nature of low- and high-temperature anomalies in electrical properties LaSr(Ca)MnO films with clusterized structure is investigated. Results concern the cluster sizes $D=100--150\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$, which charge quantization importance but quantum confinement does not yet have an appreciable effect on samples. samples are determined by spin-dependent tunneling. It shown that minima resistance versus temperature curves may be explained taking into account Coulomb...
We investigated the influence of UV $(\mathrm{KrF}, \ensuremath{\Elzxh}\ensuremath{\omega}=5.01 \mathrm{eV})$ pulsed laser irradiation on atomic order and optical properties amorphous YBaCuO films containing crystalline clusters nanometer (up to 25 nm) size characterized by high mobility structural elements due lack sharp interphase boundaries. The presence in medium leads higher disorder latter, while electronic states relatively narrow $(\ensuremath{\approx}2 $\mathrm{Cu} {3d}^{10}$ band...
X-ray structural and optical methods were applied to make a detailed investigation of atomic electronic structure superconducting YBa2Cu3O7−δ films obtained by pulsed laser deposition. Optical transmission spectrum was found depend not only on intraband (ℏω<1.2 eV) interband (ℏω>1.95 transitions, but also contributions from charge transfer transitions O 2p⇒Cu 3d in the dielectric phase due local order system crystallographic (11l) planes. Superconducting properties are...
The growth of La0.7Sr0.3MnO3 films in magnetron plasma, special conditions, leads to the appearance ensembles micron-sized spherical crystalline clusters with fractal structure, which we consider be a new form self-organization solids. Each ensemble contains 105–106 elementary clusters, 100–250 Å diameter. Interaction is realized through interatomic chemical bonds, intrinsic manganites. Integration peripheral areas interacting results formation common intercluster medium ensemble. We argue...
Using the x-ray diffraction method, atomic rearrangement in amorphous La0.6Sr0.2Mn1.2O3 films is investigated at growth temperatures Ts = 20–300 °C. Two stages disorder–order phase transition are discovered. In first stage, structure undergoes ordering 100 °C up to a maximal concentration of small (D≈30 Å) clusters which occupy 90% total volume. 100–150 temperature interval, disordering and change short-range order prepare onset second stage. starting with 150 °C, progressive crystallization...
Investigation of the conductivity mechanisms in ferromagnetic Fe67Cr18B15 metallic glasses with clusterized structure reveals anomalies behaviour resistance and magnetoresistance (MR) a narrow temperature interval, T = 3.6–3.1 K. The are seen as sharp decrease sample resistivity this range, rate equal to 3.6% K − 1, i.e. 200–500 times more than 0.008–0.021% 1 range 300–4 MR same increases 1000 larger (4% at ∼ 3.1–3.6 K) (<0.0015% 1). We explain result by appearance local superconductivity...
We have reinforced local superconductivity in ferromagnetic Fe(67)Cr(18)B(15) metallic glasses by ion irradiation. Superconductivity this medium appears due to the presence of large-scale layered clusters Fe-Cr phase, 150-230 Å size, with a (or superparamagnetic) Fe-rich core and nonmagnetic Cr-rich superconducting shell. Here we show that intensification concentration phase separation under (Ar(+)) irradiation, volume increases from initial 0.4-0.5% up 7-8%. After resistivity jump Δρ/ρ...