13 citations · 39 across the 11 of their papers we have counts for
11 papers
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…
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…
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…
Interfacial Effects and Negative Capacitance State in P(VDF-TrFE) Films with BaTiO3 Nanoparticles
Oleksii V. Bereznykov, Oleksandr S. Pylypchuk, Victor I. Styopkin +7
We analyze the temperature dependences of the effective dielectric permittivity of P(VDF-TrFE) films with BaTiO3 nanoparticles (with the average size 24 nm). Transition from a weak…
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…
Induced smectic ordering and blue phase formation in mixtures of cyanobiphenyls and cholesterol esters
Natalia A. Kasian, Longin N. Lisetski, Serhii E. Ivanchenko +3
It has been found that in mixtures of nematic E7 and smectogenic cholesteryl oleyl carbonate (COC) the S-N* transition temperature is substantially (by ~20 K) increased, as com…
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…