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Raman spectra and some optical properties (pseudogap E g *, refractive index n) of As 40 S 60 - x Se x (x = 0, 10, 15, 20) glasses and thin films have been studied. The analysis of the Raman spectra has enabled us to make a conclusion about the microheterogeneous model of the glass and thin film...
Within the framework of the effective field theory with a probability distribution technique that accounts for the self spin correlations, we study the effects of surface on the critical temperature of ferroelectric films using the transverse spin-1/2 Ising model. The equations for the critical...
Distribution of polarization P (x,z) in 180° ferroelectric domains in uniaxial ferroelectric film is studied as function of film thickness 2a f and temperature T. It is shown that close to transition temperature and for the very thin films < 100nm the polarization has gradual (soft) sin-like...
Thermodynamic theory (Landau-Devonshire) of ferroelectric thin films undergoing first order phase transition is applied to calculate the influence of imperfection surface layer and film thickness on the critical temperatures namely superheating t sh and supercoling t sc . The numerical results...
The saturation magnetization, the Curie temperature and compensation temperature have been investigated for Fe 1-x Gd x (0 ≤ x ≤ 1) amorphous alloys films using the Monte Carlo simulation. Our results of simulation showed that only adjustable parameters of J Fe-Fe and J Fe-Gd exchange...
Study of guided waves in inhomogeneous elastic bodies has been an important area of solid mechanics for well over a century. Initial studies in the plates were applied to analyze surface acoustic waves in semi-infinite substrates and multilayered structures. Recently, several investigations have...
The accurate characterization and modeling of magnetic material are critical in simulating the performance analysis of electrical circuits incorporating magnetic components. In this study, a new approach for modeling hysteresis loop of ferromagnetic material based on adaptive neuro-fuzzy...
The ultralow elastic and DC electrical properties of SiO 2 -NaNO 2 nanocomposite, prepared by embedding of sodium nitrite into porous glasses with 7 nm average pore diameter, have been studied within temperature range 300-600 K. It was found considerable reduction of shear elastic modulus G in...
The calculations of critical cooling rates of melts, crystallization parameters and the results of structural investigations of (SbSI) x (As 2 S 3 ) 100 - x , (SbSI) x (As 2 Se 3 ) 100 - x , (SbSI) x (GeS 2 ) 100 - x , (50 < x < 100) glasses have been given. It has been determined that...
This paper presents a new method for determining the permittivity profile of an inhomogeneous material. The measurement method chosen is the transmission line method in coaxial line geometry and simple is included between the two conductors of the coaxial line. The reconstruction process pass...
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