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The interface roughness disturbs the planar geometry and the restraint conditions imposed (by interface potentials) on the motion of the mobile charge carriers create deviation from integral (spectral) dimensionality. In our contribution we calculate the interlayer coupling that accounts for the fractional dimensionality and show that effect interface roughness on the interlayer coupling can be accounted...
The process of the crystal growth kinetics was investigated using the Fokker-Planck equation. The use of the diffusion Fick equation to relate the surface concentration and diffusion requires the use of the modified surface diffusion coefficient which is D = Ds( 1+o(β) where: Ds - is a diffusion coefficient witch the absence of adsorption and desorption, β =1/ξTD is a ratio of relation time characterizing...
A study of the magnetic structure of TbMn0.33Ge2 has been made using a neutron diffractometer of better resolution and new results have been obtained. The paramagnetic neutron diffraction data confirmed the CeNiSi2 - type of crystal structure reported earlier for this compound. The magnetic moments are located on terbium. At 1.5 K Tb magnetic moments have two components: a collinear and sine wave...
Thermally stimulated relaxation (TSR) phenomena are analysed on the basis of several analytical approximations. These approximations - e.g. the general order kinetics (GOK) model and the mixed order kinetics(MOK) are usually oversimplified with respect to the real phenomena under study. Therefore, the application of these equations often leads to erroneous results or misleading interpretations. Some...
The processes of heat transfer in the pulse irradiated crystal with non-linear heat parameters was studied. The implicit numerical method applied. It has been showen, that the non-linearity of heat parameters essentially changes conditions of heating and cooling to a crystal. Time evolution of heat field in depth of crystals in different condition of pulse irradiation was investigated.
Positron annihilation Iifetime spectroscopy is applied to the study of gamma irradiation effect on polymers based on the acrylate oligomers. The gamma irradiation of Co60 was carried out in air, with a flux of 20 Gy s-1. The measurements were made on specimens with different absorbed dose in the range 10-100 kGy. The longest lifetime, τ3, in three-component analyses of the spectra was associated with...
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