Cietvielu fizikas institūts / Institute of Solid State Physics: Recent submissions
Now showing items 381-400 of 652
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On the Heuristic Procedure to Determine Processing Parameters in Additive Manufacturing based on Materials Extrusion
(MDPI AG, 2020)We present a heuristic procedure for determining key processing parameters (PPs) in materials-extrusion-based additive manufacturing processes. The concept relies on a design-of-experiment approach and consists of eleven ... -
Fabrication and characterization of magnetic FePt nanoparticles prepared by extraction–pyrolysis method
(Lietuvos Mokslu Akademijos, 2018)In the present work, possibilities of the extraction–pyrolysis method (EPM) to produce FePt nanoparticles with the face-centered tetragonal (fct) phase were studied. A mixture of fine-disperse powder of carbonyl iron and ... -
Energy level determination of purine containing blue light emitting organic compounds
(SPIE - International Society for Optics and Photonics, 2018)Organic light emitting diodes (OLED) have found their applications in the mobile and TV screens. Till now the commercially available diodes are made by expensive thermal evaporation in a vacuum. The costs of OLED fabrication ... -
Determination of third-order nonlinear optical properties of ABI derivatives
(International Frequency Sensor Association, 2019)In this paper we studied linear and nonlinear optical properties of novel organic materials MeSBI and MeOBI in form of solution with chloroform as solvent. For experimental measurements we implemented Z-scan method as it ... -
Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals
(Nature Research, 2020)Cerium doped Gd3Ga3Al2O12 (GGAG) single crystals as well as GGAG:Ce single crystals co-doped by divalent (Mg2+, Ca2+) and tetravalent (Zr4+, Ti4+) ions have been studied by means of time-resolved luminescence as well as ... -
2D slab models of TiO2 nanotubes for simulation of water adsorption: Validation over a diameter range
(Elsevier B.V., 2020)Currently a lot of attention is paid to 1D nanomaterials due to their advantages in comparison to bulk materials. They offer broad possibilities of application, including photocatalytic water splitting. Simulations of water ... -
Direct and indirect determination of electrocaloric effect in Na0.5Bi0.5TiO3
(AIP Publishing, 2017)Direct and indirect studies of the electrocaloric effect were carried out in poled and depoled Na0.5Bi0.5TiO3. For this purpose, polarization and electrocaloric effect temperature change measurements were made at different ... -
Preparation and dielectric properties of (Na0.5K0.5)NbO3 ceramics with ZnO and CdO addition
(Taylor and Francis Ltd., 2019)The sintering conditions, phase structure, and electrical properties of the ZnO and CdO doped (Na0.5K0.5)NbO3 (NKN) ceramics were investigated and discussed. All the samples were prepared by a solid state reaction method. ... -
Novel octahedral tilt system a + b + c + in (1 − x)Na0.5Bi0.5TiO3–xCdTiO3 solid solutions
(Springer Verlag, 2017)(1 − x)Na0.5Bi0.5TiO3–xCdTiO3 solid solutions in the whole concentration range (0.0 ≤ x ≤ 1.0) were studied by means of X-ray diffraction, dielectric spectroscopy and polarization measurements. The study was mainly focused ... -
Grain growth in Na0.5Bi0.5TiO3-based solid solutions
(Taylor and Francis Ltd., 2019)This paper discusses effects of different dopants, sintering technique and parameters on microstructure and properties of pure and Yb, Er-doped Na0.5Bi0.5TiO3 (NBT). All stoichiometric compositions follow the abnormal grain ... -
Heat capacity and thermal conductivity of multiferroics Bi1-xPrxFeO3
(Taylor and Francis Ltd., 2019)The heat capacity and thermal conductivity of multiferroics Bi1–xPrxFeO3 (0 ≤ x ≤ 0.50) has been studied in the temperature range of 130–800 K. A slight substitution of praseodymium for bismuth is found to lead to a ... -
Effects of CuO doping on structure, microstructure and dielectric properties of BaTiO3–PbTiO3 solid solution
(Taylor and Francis Ltd., 2019)Ba0.7Pb0.3TiO3 and Ba0.7Pb0.3TiO3+yCuO (y = 0.1 wt%, 0.5 wt%, 1 wt% and 3 wt%) samples were prepared by a solid state reaction method. High purity raw materials were used. Structural properties of the sintered pellets were ... -
Dielectric and acoustic properties of modified barium titanate ceramics
(Taylor and Francis Inc., 2019)A study of cobalt doping effect on the dielectric response and elastic properties of Ba0.95Pb0.05TiO3 solid solution within the range of 20–200 °C is reported. The results of a study of the dielectric permittivity, dielectric ... -
Dielectric properties and ac conductivities of Bi 1− x Sm x FeO 3 ceramics
(Taylor and Francis Ltd., 2019)Dielectric permittivity, dielectric losses and ac-conductivity of polycrystalline Bi1−xSmxFeO3 (x = 0; 0.05; 0.1; 0.15; 0.2) are measured in the frequency range 1 kHz–10 MHz and in the temperature range 25–600 °C. Anomalies ... -
Photoelectric fields in doped lithium niobate crystals
(Taylor & Francis, 2019)Photoinduced light scattering (PILS) in nominally pure stoichiometric and congruent lithium niobate single crystals (LiNbO3), and ones doped with B³⁺, Cu²⁺, Zn²⁺, Mg²⁺, Gd³⁺, Y³⁺, Er³⁺ cations was studied. All crystals ... -
Optical properties and structure particularities of LiNbO3 crystals grown from a boron-doped melt
(Taylor and Francis Ltd., 2019)A series of LiNbO3:B crystals was grown from the melt doped by boron. It is shown that LiNbO3:B crystals possess an increased resistance to optical damage. We have found changes according to Raman spectra confirming the ... -
Changes in freshwater sediment microbial populations during fermentation of crude glycerol
(Pontificia Universidad Catolica de Valparaiso, 2021)Background: This work studied how the exposure to an unusual substrate forced a change in microbial populations during anaerobic fermentation of crude glycerol, a by-product of biodiesel production, with freshwater sediment ... -
High-Quality Si-Doped β-Ga2O3 Films on Sapphire Fabricated by Pulsed Laser Deposition
(Wiley-VCH Verlag, 2020)Pulsed laser ablation is used to form high-quality silicon-doped β-Ga2O3 films on sapphire by alternatively depositing Ga2O3 and Si from two separate sources. X-ray analysis reveals a single crystallinity with a full width ... -
Impact of gadolinium on the structure and magnetic properties of nanocrystalline powders of iron oxides produced by the extraction-pyrolytic method
(MDPI AG, 2020)Interest in magnetic nanoparticles is primarily due to their practical use. In this work, for the production of nanocrystalline powders of pure and gadolinium doped iron oxides, the extraction-pyrolytic method (EPM) was ... -
Comparative ab initio calculations of reo3, srzro3, bazro3, pbzro3 and cazro3 (001) surfaces
(MDPI AG, 2020)We performed, for first time, ab initio calculations for the ReO2-terminated ReO3 (001) surface and analyzed systematic trends in the ReO3, SrZrO3, BaZrO3, PbZrO3 and CaZrO3 (001) surfaces using first-principles calculations. ...