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Article
Heterogeneous Polarized States in Ferroelectric Inclusions in a Ferroelectric–Dielectric Nanocomposite
The behavior of the previously observed inhomogeneous polarized states in ferroelectric inclusions of the nanocomposite is analyzed in detail. The domain structure of ferroelectric particles depends on the tem...
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Article
On the mechanism of the increasing phase transition point in ferroactive nanocomposites
The numerical analysis of a nonlinear equation set has revealed a possible increase in the ferroelectric phase transition point at the presence of the intermediate layer at the ferroelectric–dielectric interfa...
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Article
On the Parameters Determining the Special Features of Phase Transitions in Composite Materials
Within the limits of the Ginzburg–Landau phenomenological theory, the key parameters responsible for the structural phase transition (PT) in small particles are determined. It is shown that the displacement of...
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Article
On the change in the mechanism of the phase transition in a ferroelectric inclusion of a ferroelectric-dielectric nanocomposite as a function of its size
It has been shown using the numerical analysis of the nonlinear system of equations that the phase transition in a ferroelectric inclusion, starting from a specific size depending on its shape, occurs into an ...
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Article
A multifunctional contactless profilometer based on a tunable acousto-optical image filter
A contactless complete-field profilometer operating as an optical coherent microscope with the spectral recording is designed. Its special feature is that the spectral selection is carried out in the receiving...
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Article
Full-field optical coherence microscopy based on acousto-optic filtration of interference images
The problem of three-dimensional near-surface imaging of microscopic structures is discussed. Anew scheme of optical coherence microscope with detection in the spectral domain is proposed. It is based on a bro...
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Article
Effect of thermal stresses on the phase transition temperature in a ferroelectric-dielectric nanocomposite
The mechanism of an increase in the phase transition temperature of a ferroelectric-dielectric nanocomposite above the corresponding temperature of an unbounded homogeneous ferroelectric has been revealed. The...
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Article
Combined optical-coherence and spectral microscopy based on tunable acousto-optic filters of images
A new optical scheme for the microscopic investigation of biological objects is proposed, which combines principles of the optical-coherence and spectral microscopy. The proposed system is based on the acousto...
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Article
IR spectroscopy study of the kinetics of the gas-phase reaction between methanol and boron trichloride
We present the results of a Fourier transform IR spectroscopy study of the kinetics of the gas-phase reaction between methanol and boron trichloride. From spectral data on the kinetics of the process, we deter...
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Article
Dielectric properties of porous aluminum and silicon oxides with inclusions of triglycine sulfate and its modified analogs
This paper reports on an investigation of the temperature dependences of the capacitance and conductance of composite materials prepared by incorporating the ferroelectric TGS and its analogs—TGS with addition...
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Article
Effect of point defects on phase transitions in ferroelectric nanocrystals
The dependences of the phase transition temperature of ferroelectric nanocrystals in a dielectric matrix on the point charged defect concentration have been obtained. The influence of point defects on the nonl...
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Article
On the generalized susceptibility of ferroelectric-dielectric nanocomposites
The linear response of ferroelectric-dielectric composite was studied and the frequency dependences of the real and imaginary parts of its susceptibility as functions of the ferroelectric granule sizes and tem...
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Article
The role of size effects in sha** the properties of heterogeneous ferroelectric active systems
The effect of the sizes and shapes of ferroelectric particles, one component of a dielectric composite, on the ferroelectric phase-transition temperature was studied within the phenomenological Landau theory. ...
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Article
An AF-1 Analytical Fourier-Transform Spectrometer for a Wide Field of Applications
An AF-1 Fourier spectrometer is developed on the basis of a two-beam interferometer with a pendulum-type scanning unit, which is manufactured of a special alloy ensuring its time stability, and a stationary bl...
