13 citations · 39 across the 16 of their papers we have counts for
16 papers
A colossal dielectric response of Bi1-xSmxFeO3 nanopowders
Vladyslav O. Kolupaiev, Olexander S. Pylypchuk, Vladimir N. Poroshin +6
The dielectric permittivity of the pressed powder samples of Bi1-xSmxFeO3, with Sm content "x" varying in the range 0 - 0.2, has been investigated in the temperature range from 20…
Impact of Carbon Contamination on the Low-Temperature Electric Conduction of the Spark-Plasma Sintered Barium Titanate Ceramics
Oleksandr S. Pylypchuk, Taisiia O. Kuzmenko, Denis O. Stetsenko +7
The dielectric and electric conduction properties of BaTiO3 samples fabricated by the spark plasma sintering with additional contamination by different content of carbon have been…
Influence of BaTiO_3 nanoparticles on the anisotropy of the dielectric properties of nematic liquid crystal 5CB
Juliya M. Gudenko, Oleksandr S. Pylypchuk, Victor V. Vainberg +6
This work is devoted to the mechanisms of dielectric response and electric conductivity of suspensions consisting of the nematic liquid crystal 5CB with different concentrations (f…
Correlations Between the Dielectric Properties, Domain Structure Morphology and Phase State of Bi1-xSmxFeO3 Nanoparticles
Oleksandr S. Pylypchuk, Vladyslav O. Kolupaiev, Victor V. Vainberg +5
Nanoscale multiferroics are basic model objects for studying polar, magnetic and magnetoelectric properties and mutual couplings. Bismuth-samarium ferrite (Bi1-xSmxFeO3) is a model…
Electric Charge Transport and Dielectric Properties of the Barium Titanate Ceramics Obtained by Spark-Plasma Sintering with Different Carbon Content
Oleksandr S. Pylypchuk, Victor V. Vainberg, Denis O. Stetsenko +9
Barium titanate (BaTiO3) ceramics with a different content of carbon were synthesized by spark-plasma sintering (SPS) at the temperature of 1100 C in vacuum under pressure. The con…
Magnetic properties and charge transport mechanisms in oxygen-deficient HfxZr1-xO2-y nanoparticles
Oleksandr S. Pylypchuk, Eugene A. Eliseev, Andrii V. Bodnaruk +12
Study of nanoscale hafnia-zirconia physical properties is the key topic in fundamental and applied science. However, charge transport mechanisms and magnetic properties of hafnia-z…
Colossal dielectric response of HfxZr1-xO2 nanoparticles
Oleksandr S. Pylypchuk, Victor V. Vainberg, Vladimir N. Poroshin +10
We reveal a colossal dielectric response of small (5 - 10 nm) oxygen-deficient HfxZr1-xO2 nanoparticles (x = 1 - 0.4), prepared by the solid-state organonitrate synthesis. The effe…
Dynamics of charge states at the surface of a ferroelectric nanoparticle in a liquid crystal
Juliya M. Gudenko, Oleksandr S. Pylypchuk, Victor V. Vainberg +7
The liquid crystal with suspended ferroelectric nanoparticles is an interesting object for fundamental research of the long-range dipole-dipole interactions; as well as it is promi…
Resistive switching and charge accumulation in Hf0.5Zr0.5O2 nanoparticles
Oleksandr S. Pylypchuk, Ihor V. Fesych, Victor V. Vainberg +13
We revealed the resistive switching, negative differential resistance and charge accumulation effects in Hf0.5Zr0.5O2 nanopowders sintered by the auto-combustion sol-gel method and…
Ferroelectric Nanoparticles in Liquid Crystals: The Role of Ionic Transport at Small Concentrations of the Nanoparticles
Juliya M. Gudenko, Oleksandr S. Pylypchuk, Victor V. Vainberg +7
We reveal the visible influence of the ultra-small concentrations (1 wt.% or less) of the BaTiO3 nanoparticles (average size 24 nm) on the current-voltage characteristics and capac…
The impact of morphological structure and flexo-chemical strains on the electric transport mechanisms in the molybdenum-disulfide-oxide nanoflakes
Oleksandr S. Pylypchuk, Victor V. Vainberg, Vladimir N. Poroshin +11
Electric conduction mechanisms are studied in the pressed nanoflake powder of the molybdenum-disulfide-oxide (MoSxOy) depending on their content and structure. The MoSxOy nanoflake…
Anomalous Behavior of the Dielectric and Pyroelectric Responses of Ferroelectric Fine-Grained Ceramics
Oleksandr S. Pylypchuk, Serhii E. Ivanchenko, Mykola Y. Yelisieiev +12
We revealed the anomalous temperature behavior of the giant dielectric permittivity and unusual frequency dependences of the pyroelectric response of the fine-grained ceramics prep…
Effective Dielectric Response of Dense Ferroelectric Nanocomposites
Oleksandr Pylypchuk, Serhii Ivanchenko, Yuriy Zagorodniy +4
We measured the temperature dependences of the capacity and dielectric losses of the tape-casted dense ferroelectric composites consisting of 28 vol.% BaTiO3 nanoparticles (average…
Size-Induced High Electrocaloric Response of Dense Ferroelectric Nanocomposites
Anna N. Morozovska, Oleksandr S. Pylypchuk, Serhii Ivanchenko +9
Analytical results obtained within Landau-Ginzburg-Devonshire approach and effective media models, predict that the synergy of size effects and Vegard stresses can significantly en…
Resistive switching effect in the n-InGaAs/GaAs heterostructures with double tunnel-coupled quantum wells
P. A. Belevskii, M. N. Vinoslavskii, V. V. Vainberg +2
The electric conductivity behavior in the single and double tunnel-coupled quantum wells (QW) with different doping profile caused by impact of short pulses of the strong longitudi…
Electric Transport Properties in the 2D-MoS2
V. V. Vainberg, O. S. Pylypchuk, V. N. Poroshin +2
The features of electric transport in the powder samples consisting of the nanosize 2D-MoS2 flakes with different number of layers have been studied under the conditions of uniaxia…