Radiation-Induced Defects in Lithium Sulfate Crystals

Russian Physics Journal -     

Analytical investigation into the mechanism of dielectric losses due to interlayer polarization

The theory of dielectric space-charge polarization losses describes well both the model of an inhomogeneous dielectric [1] and the polarization resulting from mosaic blocks of alkali-halide crystals [2]. The Debye frequency dependences ε*(ω) and tan δ(ω) with non-Arrhenius relaxation time are calculated in the first approximation of perturbation theory [3, 4] with the use of a nonlinear system of the Fokker-Planck and Poisson equations for the interlayer polarization with allowance for tunnel transitions of relaxation oscillators. For the Maxwell mechanism of space-charge relaxation, tan δ(ω) also has the Debye form [5]. It should be noted that in studies cited above the electric field was considered uniform, and the nonlinearity of the initial system of equations was not investigated. This paper removes these restrictions and elaborates a theory of relaxation mechanism. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 28–34, November, 2006.     

Computer Analysis of Thermally Stimulated Currents in Electrets with Hydrogen Bonds

Russian Physics Journal -     

Mechanism of formation of space-charge polarization in dielectrics

A general mechanism of space-charge relaxation in dielectrics, whose separate manifestations were studied in [5–7], is investigated. A strict solution of a system of the nonlinear Fokker-Planck and Poisson equations has been derived in the form of a Fourier series; a recurrent relation is suggested for the oscillation modes which allows the mechanism of space-charge relaxation to be considered as an interaction of modes generated in crystals in an external electric field. Very cumbersome calculations do not allow us to estimate the opportunity of technical applications of the solution obtained within the framework of one paper. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 19–27, November, 2006.     

Dimensional effects in nanosized layers under establishing polarization in hydrogen-bonded crystals

The dimensional effects occurring in nanosized crystal layers under proton relaxation are studied by thermopolarization. The calculations are performed in the quasi-classical approximation using the density-matrix method. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 6–15, November, 2005.     

Theory of the electret state in crystals with hydrogen bonds

The mechanism of proton migration over hydrogen bonds is considered. On this basis, a system of kinetic equations describing electret charge formation is written and solved in the linear approximation. The relaxation of heterocharge and homocharge is investigated, and a formula determining the electret polarization is obtained. E. A. Buketov Karagandinsk State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 77–82, June, 1998.     

Proton relaxation in dielectrics

A kinetic equation is found which is written taking account of tunneling transitions for proton relaxation with a potential shape represented by a multiwell model having parabolic barriers. Study of the solution allows one to establish the proton relaxation mechanism in dielectrics and calculate the complex dielectric constant. Comparison with experiment shows acceptable agreement between calculated and experimental charts. Karaganda State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 80–85, February, 1998.     

Maxwellian Relaxation in Crystals with Hydrogen Bonds

Russian Physics Journal -