A. V. Tumarkin
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View article: Enhanced Microwave Commutation Quality Factor of Tunable Capacitors Based on SrTiO3 Thin Films
Enhanced Microwave Commutation Quality Factor of Tunable Capacitors Based on SrTiO3 Thin Films Open
Thin films of strontium titanate were grown on a polycrystalline aluminum oxide substrate using magnetron sputtering. These films exhibit high structural quality and nonlinear properties, which make them promising for microwave application…
View article: Theoretical and Experimental Determination of the Thickness of a Metal Film Grown by Magnetron Sputtering at High Discharge Power
Theoretical and Experimental Determination of the Thickness of a Metal Film Grown by Magnetron Sputtering at High Discharge Power Open
A theoretical model is proposed that allows us to describe the processes of formation of the sputtered atom flow, transport of this flow in the target-substrate space and deposition of the substance onto the substrate during magnetron sput…
View article: Characterization of the Microstructure of Sr0.75Ba0.25Nb2O6 Thin Films by Brillouin Light Scattering
Characterization of the Microstructure of Sr0.75Ba0.25Nb2O6 Thin Films by Brillouin Light Scattering Open
Strontium-barium niobate (SrxBa(1−x)Nb2O6) films can be considered as a promising material for microwave applications due to high dielectric nonlinearity and relatively low losses. Since strontium-barium niobate has a disordered structure …
View article: Enhanced Crystallinity of SrTiO3 Films on a Silicon Carbide Substrate: Structural and Microwave Characterization
Enhanced Crystallinity of SrTiO3 Films on a Silicon Carbide Substrate: Structural and Microwave Characterization Open
Thin films of strontium titanate, which reveal high structure quality and tunable properties prospective for microwave applications at room temperature, were grown on a semi-insulating silicon carbide substrate using magnetron sputtering f…
View article: Composite Right/Left-Handed Leaky-Wave Antenna with Electrical Beam Scanning Using Thin-Film Ferroelectric Capacitors
Composite Right/Left-Handed Leaky-Wave Antenna with Electrical Beam Scanning Using Thin-Film Ferroelectric Capacitors Open
This article presents a wide-angle-scanning leaky-wave antenna (LWA) based on a composite right/left-handed (CRLH) transmission line. In contrast to traditional semiconductor elements, thin-film ferroelectric capacitors were implemented in…
View article: SrTiO3 Thin Films on Dielectric Substrates for Microwave Applications
SrTiO3 Thin Films on Dielectric Substrates for Microwave Applications Open
Thin films of strontium titanate, which have nonlinear properties that are promising for microwave applications, were grown on a polycrystalline aluminum oxide substrate using magnetron sputtering and high-temperature annealing. It was sho…
View article: Correction: Tumarkin et al. Composite Metamaterial: Ferrite Matrix with Ferroelectric Inclusions. Coatings 2023, 13, 117
Correction: Tumarkin et al. Composite Metamaterial: Ferrite Matrix with Ferroelectric Inclusions. Coatings 2023, 13, 117 Open
The authors were not aware of errors made in the proofreading phase, and, hence, wish to make the following corrections to this paper [...]
View article: Enhanced Tunable Properties of Strontium Barium Niobate Films on Dielectric Alumina Substrate at Microwaves
Enhanced Tunable Properties of Strontium Barium Niobate Films on Dielectric Alumina Substrate at Microwaves Open
(Sr,Ba)Nb2O6 (SBN) relaxor ferroelectric thin films exhibiting nonlinear properties promising for microwave applications were grown on a polycrystalline aluminum oxide substrate for the first time. Films of good crystallinity were obtained…
View article: Composite Metamaterial: Ferrite Matrix with Ferroelectric Inclusions
Composite Metamaterial: Ferrite Matrix with Ferroelectric Inclusions Open
A metamaterial based on periodic ferroelectric inhomogeneities in a magnetic ferrite matrix including a quantity of ferroelectric composite in a matrix, demonstrating relative low microwave losses and effective dielectric permittivity, was…
View article: Ion-plasma deposition of multicomponent films with a given law of composition distribution by thickness
Ion-plasma deposition of multicomponent films with a given law of composition distribution by thickness Open
A method is proposed for ion-plasma deposition of thin multicomponent films with the ability to control the component composition in thickness (graded film) with a change in the pressure of the working gas according to a given law. Using t…
View article: High Tunable BaTixZr1-xO3 Films on Dielectric Substrate for Microwave Applications
High Tunable BaTixZr1-xO3 Films on Dielectric Substrate for Microwave Applications Open
In this study, the structural and microwave properties of BaTiZrO3 films deposited on alumina substrate were investigated. The films were deposited by RF magnetron sputtering in Ar/O2 ambient atmosphere. The research of the island films at…
View article: Structural and Electrical Properties of Glass-Ceramic Ferroelectric Composite Materials
Structural and Electrical Properties of Glass-Ceramic Ferroelectric Composite Materials Open
Introduction . Materials exhibiting high dielectric permittivity are relevant for use in modern ultrahigh-frequency electronics. Among them, ferroelectrics with high dielectric nonlinearity present particular interest. The electrical stren…
View article: Electric Tunable Structures Based on BaZr<sub>x</sub>Ti<sub>1–x </sub>O<sub>3</sub> and BaSn<sub>x</sub>Ti<sub>1–x</sub>O<sub>3</sub> Solid Solutions for Microwave Applications
Electric Tunable Structures Based on BaZr<sub>x</sub>Ti<sub>1–x </sub>O<sub>3</sub> and BaSn<sub>x</sub>Ti<sub>1–x</sub>O<sub>3</sub> Solid Solutions for Microwave Applications Open
Introduction. An experimental study of the structural and electrophysical properties of multicomponent films of solid solutions of barium titanate-zirconate and barium titanate-stannate on sapphire substrates has been carried out. These ma…
View article: Enhanced Tunability of BaTixSn1−xO3 Films on Dielectric Substrate
Enhanced Tunability of BaTixSn1−xO3 Films on Dielectric Substrate Open
The structural properties of ferroelectric films of barium titanate-stannate on alumina substrates and the microwave characteristics of planar capacitive elements based on them are studied. It is established that the composition of the gas…
View article: Formation of Millimeter Waves with Electrically Tunable Orbital Angular Momentum
Formation of Millimeter Waves with Electrically Tunable Orbital Angular Momentum Open
A method for forming electromagnetic waves with a tunable nonzero orbital angular momentum (OAM) is proposed. The approach is based on transforming an incident plane wave into a helical one using an electrically tunable ferroelectric lens.…
View article: Transparent for microwave electrodes for applications in nonlinear devices based on ferroelectric ceramic
Transparent for microwave electrodes for applications in nonlinear devices based on ferroelectric ceramic Open
This article provides the results of an experimental investigation of characteristics of thin-films transparent electrodes deposited on ferroelectric ceramic plates. The experimental investigation of parameters of ZnO and resistive alloy o…
View article: Structural Dependent Eu3+ Luminescence, Photoelectric and Hysteresis Effects in Porous Strontium Titanate
Structural Dependent Eu3+ Luminescence, Photoelectric and Hysteresis Effects in Porous Strontium Titanate Open
Eu3+ doped porous nanostructured SrTiO3 films and powder fabricated by sol-gel route without using any precursor template are characterized by different morphology and phase composition. The films and the power show red and yellow luminesc…
View article: Barium-Strontium Titanate/Porous Glass Structures for Microwave Applications
Barium-Strontium Titanate/Porous Glass Structures for Microwave Applications Open
Based on porous silicate glasses obtained by ion exchange, glass-ceramic materials containing a solid solution of barium-strontium titanate with a dielectric constant of more than 100 at microwaves, were synthesized for the first time. Gla…
View article: Heterostructures “Ferroelectric Film/Silicon Carbide” for High Power Microwave Applications
Heterostructures “Ferroelectric Film/Silicon Carbide” for High Power Microwave Applications Open
The ferroelectric barium–strontium titanate (BST) multi-layer structure has been formed directly on silicon carbide by serial deposition and “in situ” annealing of layers. This approach allowed us to achieve the high-quality perovskite lat…
View article: Microstructure and Properties of PZT Films with Different PbO Content—Ionic Mechanism of Built-In Fields Formation
Microstructure and Properties of PZT Films with Different PbO Content—Ionic Mechanism of Built-In Fields Formation Open
Experimental studies were conducted on the effects of lead oxide on the microstructure and the ferroelectric properties of lead zirconate-titanate (PZT) films obtained by the method of radio frequency (RF) magnetron sputtering of a ceramic…
View article: Heat-Resistant Ferroelectric-Polymer Nanocomposite with High Dielectric Constant
Heat-Resistant Ferroelectric-Polymer Nanocomposite with High Dielectric Constant Open
The high dielectric constant ferroelectric-polymer nanocomposite was developed for producing the heat-resistant and chemical stable planar layers. According to the composite coatings formation conditions, the following value ranges of diel…
View article: Influence of Deposition Pressure on Component Composition and Properties of Barium Strontium Titanate Thin Films
Influence of Deposition Pressure on Component Composition and Properties of Barium Strontium Titanate Thin Films Open
Influence of deposition pressure on the properties of ferroelectric barium strontium titanate thin films obtained by RF magnetron sputtering has been investigated. It has been shown that the deposition pressure affects the component compos…
View article: The Crystal Structure and Properties of Barium Zirconate Titanate and Barium Stannate Titanate Thin Films for Microwave Applications
The Crystal Structure and Properties of Barium Zirconate Titanate and Barium Stannate Titanate Thin Films for Microwave Applications Open
Structural and radio frequency (RF) dielectric properties of thin films of ferroelectric solid solutions BaZrxTi1-xO3 and BaSnxTi1-xO3 obtained by RF magnetron sputtering of ceramic targets on Pt/ r-cut of Al2O3 sapphire substrate are inve…
View article: Domain Matched Epitaxial Growth of BaSrTiO<sub>3</sub> thin films on Al<sub>2</sub>O<sub>3</sub>
Domain Matched Epitaxial Growth of BaSrTiO<sub>3</sub> thin films on Al<sub>2</sub>O<sub>3</sub> Open
The model of the crystal epitaxial growth of multicomponent films on single crystal substrates with domain corresponds are presented to an example of a solid solution of barium strontium titanate on sapphire substrates (r-cut). Domain matc…