A5009979935- Acoustic Wave Resonator Technologies
- Ferroelectric and Piezoelectric Materials
- Magnetic properties of thin films
- Multiferroics and related materials
- Characterization and Applications of Magnetic Nanoparticles
- Mechanical and Optical Resonators
- Advanced Mathematical Modeling in Engineering
- Electronic and Structural Properties of Oxides
- Theoretical and Computational Physics
- Smart Materials for Construction
- Liquid Crystal Research Advancements
- Elasticity and Wave Propagation
- Advanced Condensed Matter Physics
- Force Microscopy Techniques and Applications
- Quantum and electron transport phenomena
- Semiconductor materials and devices
- Optical and Acousto-Optic Technologies
- Magnetic Properties and Applications
- Advanced MEMS and NEMS Technologies
- Photonic and Optical Devices
- Magnetic and transport properties of perovskites and related materials
- Sensor Technology and Measurement Systems
- Power Transformer Diagnostics and Insulation
- Photorefractive and Nonlinear Optics
- Magnetic Properties and Synthesis of Ferrites
Leibniz Institute for Solid State and Materials Research
2022-2023
Université de Picardie Jules Verne
2016-2021
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
2012-2013
Abstract Chirality, an intrinsic handedness, is one of the most intriguing fundamental phenomena in nature. Materials composed chiral molecules find broad applications areas ranging from nonlinear optics and spintronics to biology pharmaceuticals. However, chirality usually invariable inherent property a given material that cannot be easily changed at will. Here, we demonstrate ferroelectric nanodots support skyrmions which can controlled switched. We devise protocols for realizing control...
Curvilinear geometries in magnetic nanostructures provide a unique platform for exploring the interplay of symmetry, topology, and curvature magnetization dynamics. In this work, we analytically study static dynamic properties domain walls biaxial nanotubes with intrinsic Dzyaloshinskii-Moriya interaction different symmetries. We show that geometry-driven local nonlocal interactions govern profiles dynamics, enabling precise control over wall propagation Walker breakdown field. Furthermore,...
Ferroelectric materials manifest unique dielectric, ferroelastic, and piezoelectric properties. A targeted design of ferroelectrics at the nanoscale is not only fundamental appeal but holds highest potential for applications. Compared to two-dimensional nanostructures such as thin films superlattices, one-dimensional ferroelectric nanowires are investigated a much lesser extent. Here, we reveal variety topological polarization states, particularly vortex helical chiral phases, in loaded...
The past decade’s discovery of topological excitations in nanoscale ferroelectrics has turned the prevailing view that polar ground state these materials is uniform. However, systematic understanding structures still on track. Here we study stable vortex-like textures polarization nanocylinders ferroelectric PbTiO _3 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi /><mml:mn>3</mml:mn></mml:msub></mml:math> , arising due to competition elastic and...
Ferromagnetic La0.7Sr0.3Mn1-xRuxO3 epitaxial multilayers with controlled variation of the Ru/Mn content were synthesized to engineer canted magnetic anisotropy and variable exchange interactions, explore possibility generating a Dzyaloshinskii-Moriya interaction. The ultimate aim multilayer design is provide conditions for formation domains nontrivial topology in an oxide thin film system. Employing force microscopy Lorentz transmission electron varying perpendicular fields, stripe separated...
Chirality, an inherent property of most objects the universe, is a dynamic research topic in material science, physics, chemistry, and biology. The fundamental appeal this extensive study supported by technological quest to manufacture materials with configurable chiralities for emerging applications ranging from optoelectronics photonics pharmaceutics medicine. Recent advances put forth ferroelectrics as host chiral topological states form Bloch domain walls, skyrmions, merons, Hopfions,...
Employing many-valued logic (MVL) data processing allows to dramatically increase the performance of computing circuits. Here we propose employ ferroelectrics for material implementation MVL units basing on their ability pin polarization as a sequence multi-stable states. Two conceptual ideas are considered. As first system, suggest using strained ferroelectric films that can host states, allowing effective field-induced multilevel switching between them. second one, nano-samples confine...
Abstract The two-dimensional (2D) logarithmic character of Coulomb interaction between charges and the resulting confinement is a remarkable inherent property high dielectric constant (high- κ ) thin films with far reaching implications. Most foremost, this charge Berezinskii-Kosterlitz-Thouless transition notable manifestation, low-temperature superinsulating topological phase. Here we show that range can be tuned by external gate electrode unravel variety electrostatic interactions in...
A quantum paraelectric SrTiO3 is a material situated in close proximity to critical point (QCP) of ferroelectric transition which the temperature state suppressed down 0 K. However, understanding behavior phase vicinity this remains challenging. Using concentration x Pb solid solution Sr1−xPbxTiO3 (PSTx) as tuning parameter and applying combination Raman dielectric spectroscopy methods, we approach QCP PSTx study interplay classical phenomena region criticality. We obtain evolution...
Nanoelectromangetomechanical systems (NEMMS) open up a new path for the development of high speed autonomous nanoresonators and signal generators that could be used as actuators, information processing, elements quantum computers etc. Those NEMMS include ferromagnetic layers controlled by electric current due to effects related with spin transfer. In present paper we discuss another situation when current-controlled behaviour nanorod includes an antiferro- (instead one ferro-) magnetic...
We suggest the nondestructive method for determination of dielectric constant substrate-deposited thin films by capacitance measurement with two parallel wires placed on top film. The exact analytical formula such system is derived. functional dependence constants film, substrate, and environment media distance between permits to measure vast set parameters where previously proposed approximate methods are less efficient.
Charge manipulation and fabrication of stable domain patterns in ferroelectric materials by scanning probe microscopy open up broad avenues for the development tunable electronics. Harnessing polarization energy electrostatic forces with specific geometry system enables producing nanoscale domains by-design. Along that, engineering requires mastery underlying physical mechanisms that govern formation. Here, we present a theoretical description formation tip film strong in-plane anisotropy...
High fraction of the surface atoms considerably enhances influence size and shape on magnetic electronic properties nanoparticles. Shape effects in ferromagnetic nanoparticles are well understood allow to set control parameters a sample that affect its anisotropy during production. In present paper we study other widely used materials -- antiferromagnets, which possess vanishingly small or zero macroscopic magnetization. We take into account difference between bulk nanoparticle show...
Shape effects in magnetic particles are widely studied, because of the ability shape and size to control parameters a sample during its production. Experiments with nano-sized samples show that can affect also properties antiferromagnetic (AFM) materials. However, theoretical interpretation these is under discussion. A model study shape-induced AFM at resonance frequency proposed. The Lagrange function method used calculate spectrum oscillations vector synthetic multiferroic (piezoelectric +...
Shape effects in magnetic particles are widely studied, because of the ability shape and size to control parameters a sample during its production. Experiments with nano-sized samples show that can affect also properties antiferromagnetic (AFM) materials. However, theoretical interpretation these is under discussion. We propose model study shape-induced AFM at resonance frequency. The Lagrange function method used calculate spectrum oscillations vector synthetic multiferroic (piezoelectric +...
Employing many-valued logic (MVL) data processing allows to dramatically increase the performance of computing circuits. Here we propose employ ferroelectrics for material implementation MVL units basing on their ability pin polarization as a sequence multi-stable states. Two conceptual ideas are considered. As first system, suggest using strained ferroelectric films that can host states, allowing effective field-induced multilevel switching between them. second one, nano-samples confine...
Chirality, an intrinsic handedness, is one of the most intriguing fundamental phenomena in nature. Materials composed chiral molecules find broad applications areas ranging from nonlinear optics and spintronics to biology pharmaceuticals. However, chirality usually invariable inherent property a given material that cannot be easily changed at will. Here, we demonstrate ferroelectric nanodots support skyrmions which can controlled switched. We devise protocols for realizing control efficient...