Dariya Savchenko
YOU?
Author Swipe
View article: EPR evidence of paramagnetic to spin glass transition in Zn1−xMnxSe:Fe2+ single crystals
EPR evidence of paramagnetic to spin glass transition in Zn1−xMnxSe:Fe2+ single crystals Open
In this work, the paramagnetic-to-spin glass transition in Zn1–xMnxSe:Fe2+ single crystals by using the analysis of temperature-dependent electron paramagnetic resonance (EPR) spectra were investigated. The transition is characterized by t…
View article: Nature of electrically detected magnetic resonance in highly nitrogen-doped <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>6</mml:mn><mml:mi>H</mml:mi></mml:mrow></mml:math>-SiC single crystals
Nature of electrically detected magnetic resonance in highly nitrogen-doped -SiC single crystals Open
This work focuses on unraveling electron paramagnetic resonance (EPR) and electrically detected magnetic resonance (EDMR) properties of n-type 6H silicon carbide (SiC) single crystals with high concentrations of uncompensated nitrogen (N) …
View article: Electronic and magnetic properties of Zn1−xMnxSe:Fe2+,Cr2+ (x = 0.3) single crystals
Electronic and magnetic properties of Zn1−xMnxSe:Fe2+,Cr2+ (x = 0.3) single crystals Open
We report the first study of Zn1−xMnxSe:Fe2+,Cr2+ (x = 0.3) crystals by continuous wave (CW) and pulsed electron paramagnetic resonance (EPR) spectroscopic techniques. Using the advantages of pulsed EPR, spin Hamiltonian parameters for Mn2…
View article: Spin exchange dynamics in 4H SiC monocrystals with different nitrogen donor concentrations
Spin exchange dynamics in 4H SiC monocrystals with different nitrogen donor concentrations Open
4H silicon carbide (SiC) polytype is preferred over other SiC polytypes for high-power, high-voltage, and high-frequency applications due to its superior electrical, thermal, and structural characteristics. In this manuscript, we provide a…
View article: Spin exchange dynamics in 4H SiC monocrystals with different nitrogen donor concentrations
Spin exchange dynamics in 4H SiC monocrystals with different nitrogen donor concentrations Open
4H silicon carbide (SiC) polytype is preferred over other SiC polytypes for high-power, high-voltage, and high-frequency applications due to its superior electrical, thermal, and structural characteristics. In this manuscript, we provide a…
View article: Electrical properties of highly nitrogen-doped 6H-SiC single crystals: Microwave cavity perturbation study
Electrical properties of highly nitrogen-doped 6H-SiC single crystals: Microwave cavity perturbation study Open
The silicon carbide (SiC) single crystals of 6H polytype with nitrogen donor concentration ND – NA) ≈ 1∙1017 ...4∙1019 cm –3 grown using the modified Lely method were studied applying the cavity perturbation method. From the temperature de…
View article: Implementation of Broadband Electrically Detected Magnetic Resonance in a Sub-THz FraScan Spectrometer
Implementation of Broadband Electrically Detected Magnetic Resonance in a Sub-THz FraScan Spectrometer Open
Electrically detected magnetic resonance (EDMR) is an effective spectroscopic method used for characterizing semiconductive solid-state materials. High spin sensitivity and the capability to explore spin-dependent transport mechanisms, whi…
View article: Continuous wave and pulsed EPR study of Cd1-xMnxTe crystals with different Mn content
Continuous wave and pulsed EPR study of Cd1-xMnxTe crystals with different Mn content Open
The cadmium manganese telluride (Cd1–xMnxTe) crystals (x < 0.001 and x = 0.02, 0.04, 0.1) grown using the Bridgman method were studied by applying continuous wave and pulsed electron paramagnetic resonance (EPR) spectroscopy in the wide te…
View article: Improving the efficiency of studying physics by foreign students by means of digital technologies
Improving the efficiency of studying physics by foreign students by means of digital technologies Open
У роботі розглянуто питання організації вивчення фізики іноземними студентами у закладах вищої освіти України
\nна технічних спеціальностях у разі проведення навчання англійською мовою.
\nЗ метою подолання основних складнощів у навчанні ст…
View article: EPR Study of the Mn-Doped Magnesium Titanate Ceramics
EPR Study of the Mn-Doped Magnesium Titanate Ceramics Open
Manganese-doped magnesium titanate ceramic samples obtained by a solid-state reaction via sintering in the air from a mixture of MgO and TiO 2 powders of different molar ratios were analyzed by electron paramagnetic resonance (EPR) techniq…
View article: APPLICATION OF DISTANCE LEARNING TECHNOLOGIES IN THE EDUCATIONAL SPACE OF EUROPE: EXPERIENCE OF THE EDUCATION ORGANIZATION DURING THE COVID-19 PANDEMIC
APPLICATION OF DISTANCE LEARNING TECHNOLOGIES IN THE EDUCATIONAL SPACE OF EUROPE: EXPERIENCE OF THE EDUCATION ORGANIZATION DURING THE COVID-19 PANDEMIC Open
The paper analyzes up-to-date distance learning technologies used in European education system for ensuring overall organization of the educational process during the COVID-19 pandemic. Quarantine conditions have become a catalyst for deve…
View article: EPR study of paramagnetic centers in SiO2:C: Zn nanocomposites obtained by infiltration of fumed silica with luminescent Zn(acac)2 solution
EPR study of paramagnetic centers in SiO2:C: Zn nanocomposites obtained by infiltration of fumed silica with luminescent Zn(acac)2 solution Open
Silica-carbon with zinc (SiO2:C:Zn) nanocomposites obtained via infiltration with aged luminescent zinc acetylacetonate (Zn(acac)2) ethanol solution of two concentrations (1 or 4%) into the fumed silica (SiO2) matrix have been studied usin…
View article: STUDYING FEATURES OF GEL FORMATION AND RHEOLOGICAL PROCESSES OF GELATIN-BASED HYDROGELS FOR COSMETOLOGY AND MEDICINE
STUDYING FEATURES OF GEL FORMATION AND RHEOLOGICAL PROCESSES OF GELATIN-BASED HYDROGELS FOR COSMETOLOGY AND MEDICINE Open
This article studies the features of gelation and rheological processes of gelatin-based hydrogels for cosmetology and medicine. It is shown that the study of the features of the processes of structure formation of dispersed hydrogels in w…
View article: Comparative study of structural, optical and magnetic properties of Er3+ doped yttrium gallium borates
Comparative study of structural, optical and magnetic properties of Er3+ doped yttrium gallium borates Open
The paper presents the results of a comprehensive study of yttrium gallium borate (YGa3(BO3)4) crystals low-doped (0.2 wt%) with erbium (Er3+) ions by in-situ X-ray diffraction (XRD), radioluminescence (RL), thermally stimulated luminescen…
View article: Study of the dependence of the structural defects and bulk inhomogeneities of nanocrystalline hydroxyapatite on the conditions of production using a biological source of calcium
Study of the dependence of the structural defects and bulk inhomogeneities of nanocrystalline hydroxyapatite on the conditions of production using a biological source of calcium Open
The study of structural and bulk defects in nanocrystalline samples of hydroxyapatite with a developed surface was carried out. The XRD method established distortions in the crystal lattice of the synthesized samples of hydroxyapatite (HAP…
View article: Nanocomposite Based on Calcium Hydroxyapatite and Ultrafine Graphite
Nanocomposite Based on Calcium Hydroxyapatite and Ultrafine Graphite Open
Composites based on both nanodispersed calcium hydroxyapatite and ultrafine graphite are synthesized for the first time.The morphological features and electronic structure of the complexes are investigated.As revealed, the modification of …
View article: Importance of defect nanocrystalline calcium hydroxyapatite characteristics for developing the dental biomimetic composites
Importance of defect nanocrystalline calcium hydroxyapatite characteristics for developing the dental biomimetic composites Open
Applying a set of structural-spectroscopic methods of analysis we have studied the relationships between the structure, morphology and sorption characteristics of the samples of nanocrystalline carbonate-substituted hydroxyapatite (C-HAP) …
View article: Electron and hole effective masses in heavily boron doped silicon nanostructures determined using cyclotron resonance experiments
Electron and hole effective masses in heavily boron doped silicon nanostructures determined using cyclotron resonance experiments Open
We present the experimental and theoretical results of analysis of the optically- induced cyclotron resonance measurements carried out using the charge carriers in silicon (Si) nanostructures at 9 GHz and 4 K. Effective mass values for ele…
View article: The spin relaxation of nitrogen donors in 6H SiC crystals as studied by the electron spin echo method
The spin relaxation of nitrogen donors in 6H SiC crystals as studied by the electron spin echo method Open
We present the detailed study of the spin kinetics of the nitrogen (N) donor electrons in 6H SiC wafers grown by the Lely method and by the sublimation “sandwich method” (SSM) with a donor concentration of about 1017 cm−3 at T = 10–40 K. T…
View article: Temperature dependent behavior of localized and delocalized electrons in nitrogen-doped 6H SiC crystals as studied by electron spin resonance
Temperature dependent behavior of localized and delocalized electrons in nitrogen-doped 6H SiC crystals as studied by electron spin resonance Open
We have studied the temperature behavior of the electron spin resonance (ESR) spectra of nitrogen (N) donors in n-type 6H SiC crystals grown by Lely and sublimation sandwich methods (SSM) with donor concentration of 1017 cm−3 at T = 60–150…