PCSS, V.6, N3, 2005

Abstracts

O.M. Voznjak

Consideration of the Spin-Orbit Interaction Influence on the Energy Spectrum of Ideal Crystals and Disodered Solids in the Tight-Binding Method
(Review)

‘Vasyl Stefanyk’ Precarpatian National University, Chair of Physics and Chemistry of Solid,
201 Galytska Str., Ivano-Frankivsk, UA-76008, Ukraine

In the unified treatment based on two-points temperature Green function approach, the methods of taking into account the spin-orbital interaction influence on the energy spectrum of the ideal crystal and disordered solids in the tight-binding model has been considered. For the case of ideal crystal expressions for the matrix elements of the spin-orbit interaction operator matrix has been obtained using the s-type atomic wave function basis (s-model) and s-type and p-type atomic wave functions basis (sp³-model). For the case of disordered solid with the chaos of displacements equation for the spectrum has been obtained using the s-type wave functions basis in the quadratic approach of displacements with respect to the ideal crystal nodes. Solution of this equation has been found for the special cases of the linear chain of atoms and simple cubic lattice.

V.A. Shenderovs’kyj

Band-Structure Mechanism in Wave Scattering Processes in Non-Equilibrium Semiconductor Plasma

Institute of Physics of NAS of Ukraine
46, Prospect Nauky, UA-03028, Kiev-28, Ukraine, E-mail:schender@iop.kiev.ua

An effect is investigated of the energy band non-parabolicity on the scattering and transformation processes of electromagnetic waves on fluctuations in the non-equilibrium semiconductor plasma. It is shown that the deviation of the carrier energy dispersion law from the isotropic parabolic one in a high electric field to a new mechanism of the light scattering which does not occur in the equilibrium plasma. The cross section of the electromagnetic waves scattering and transformation on fluctuations in the non- equilibrium semiconductor plasma essentially depends on the energy band shape and magnitude and orientation of the external electric field

Ya.S. Budzhak

The Elements of the Statistical Theory of Thin Films Kinetic Properties

National University “Lviv Polytechnics”,
12, Bandery Str., Lviv-13, 79013, Ukraine

There are the elements of the statistical theory of film-like crystals kinetic properties, as alternative to the kinetic theory, bases on the Boltsman kinetic equation.

Ye.S. Nikonyuk², Z.I. Zakharuk¹, A.I. Rarenko¹, М.О. Коvaletz², Vya.L. Shlyakhoviy², О.V. Galochkin¹

Deep centers in Sn-doped Cd_1-XMn_XTe crystals

¹‘Yuriy Fedkovich’ Chernivtsi National University,
2, Kotsyubynskiy Str., Chernivtsi, 58012,Ukraine, E-mail:microel@chnu.cv.ua
²Ukrainian State University of Water Handling Facilities and Nature Management,
11, Soborna Str., Rivne, 33000, Ukraine, E-mail:semirivne@mail.ru

The temperature dependencies of specific resistance and Hall constant in Cd_1-XMn_XTe crystals with different Mn content have been investigated. It was found that Sn impurity doping is accompanied by specific resistance increasing on several orders and deep center formation, which energy levels lie near band gap middle.

Ya.V. Zaulychny, Yu.M. Solonin, S.S. Zvezda

The Features of X-ray CKα-Spectrum of Carbon Fibrils Emission

‘I.M. Frantsevych’ Institute of Material Science NAS of Ukraine,
3, Kryzhanivsky Str., Kyiv, 03142 Ukraine

The present paper concentrates on the structure of carbon fibers (base polyacrylnitrile) with different thickness. The results of experimental study by means of ultrasoft X-ray emission spectroscopy are presented for fibers various orientations. It’s shown that the coarse fibers CKα-spectra are wider than that in the fine fibers. Special attention is given to p-zone fine structure investigation.

K.V. Savchenko

Gamma-Ray-Induced Conduction of Ga₂Se₃

B.I. Verkin Institute for Low Temperature Physics and Engineering,
The National Academy of Sciences of Ukraine
47 Lenin Ave., Kharkov, 61103, Ukraine, E-mail:konstantin@kharkov.com, тел: +(03422) 59-60-75

The results of a study of gamma-ray-induced conduction of Ga2Se3 coarse-crystalline specimens are presented. Ga₂Se₃ is a challenging material for gamma-radiation detectors with anomalously high radiation stability [V.M. Koshkin, L.P. Gal'chinetskii, V.N. Kulik, B.G. Minkov, U.A. Ulmanis // Solid State Communications, 13, p. 1 (1973)]. The measurements of the Vickers microhardness and temperature dependence of conductivity as well as a mass-spectroscopic investigation were carried out.

P.O. Gentsar, O.I. Vlasenko, L.A. Demchyna

Influence of Surface State on the Anisotropic Spectrums of Electro-Reflection of n-Ge(110)

‘V.E. Lashkarev’ Institute of Semiconductor Physics NAS of Ukraine
45, Nauki Av., 03028, Kiev, Е-mail:gentsar@isp.kiev.ua

It is analyzing of surface contribution in the effect of electrical-reflection with the use of polarization (tensor) dependence of electro-optical effect in relation to the mechanically polished surface of n-Ge(110). Influence of surface state is analysed on the anisotropic spectrums of electro-reflection, change of form of near-surface potential barrier and internal mechanical tensions after the polish. The electronic parameters of near-surface layer of n-Ge(110) are spotted.

M.Šilinskas^a, A.Grigonis^b, Ž.Rutkūnienė^b, J.Maniks^c, V.Kulikauskas^d

The Mechanical and Optical Properties of A-C:H Films Deposited from Acetylene Using Direct Ion Beam Deposition Method

^aInstitute of Micro-and Sensor Systems, Otto von Guericke University,
Universitatsplatz 2, 39106 Magdeburg, Germany
^bPhysics Department, Kaunas University of Technology,
50 Studentu str., LT-3031 Kaunas, Lithuania.
. ^cInstitute of Solid State Physics, University of Latvia,
8 Kengaraga St.,Riga LV-1063, Latvia
^dNuclear Physics Institute, Moscow State University,
119899 Moscow, Russian Federation

Amorphous hydrogenated carbon (a-C:H) films were deposited from an acetylene/hydrogen mixture using a direct ion beam deposition method. The films were characterized by Raman spectroscopy (RS), Rutherford backscattering spectroscopy (RBS), ellipsometry, and microhardness measurements. The concentration of hydrogen increases with increasing hydrogen content in the deposition gas mixture. The hardness and the features of Raman spectra are dependent on hydrogen content and show a maximum of diamond-like fraction for a hydrogen to acetylene ratio of 1:1. Also, the strongest adhesion is observed for this gas mixture. Correlations are observed between the features of the Raman spectra and the hardness of the carbon films: the G and D bands shift to lower wave-number, the ID/IG ratio decreases, and the G band width at half maximum increases with increasing of film hardness.
Key words: amorphous hydrogenated carbon films, Raman spectroscopy, Rutherford backscattering spectroscopy, ellipsometry, microhardness.

ВV.I. Perekrestov, Y.O. Kosminska, A.S. Kornyushchenko

The Development of Spatially Distributed Selectivity Under Conditions of Stationary Nonequilibrium Condensation of Cu and Al

Sumy State University, Physical Technical Faculty
2, Rimskogo-Korsakova Str., Sumy 40007, Ukraine, E-mail:kpe@sumdu.edu.ua

The spatially distributed selectivity of the formation of Cu and Al layers at stationary nonequilibrium condensation was theoretically predicted and experimentally carried out. It was shown that the architecture of the layers is determined by position of critical energy with respect to effective binding energies of condensing atoms on the monostairs of different crystallographic planes of growing crystals. The rate of stationary nonequilibrium condensation can be significantly increased by affecting the growth surface by stream of particles that have about the same energies.

D.M. Freik, O.L. Sokolov

The Mobility of the Carriers in the Multylayer Structures AIVBVI

Department of physics and solid chemistry Precarpathian national university of name by Vasiliy Stefanyk
201, Galitska Str., Ivano-Frankivsk, 76000, Ukraine, E-mail:freik@pu.if.ua

The thickness dependence of Hall charge carriers of PbTe/PbS, PbTe/EuTe, PbTe/Pb_0,8Sn_0,2Te quantum-size structures, grown on (100) KCl monocrystalls is researches. It is separated the mobility of diffusion scattering on surface, and the mobility of misfit dislocations. It is shown, that high carrier mobility of tension by net of dislocations on the interphases boundaries.

V. Khranovskyy, L.I. Kopylova, V.I. Lazorenko, G.V. Lashkarev, V. Karpina

Features of Structure and Morphology of ZnO:Ga Films, Deposited on Monocrystalline and Amorphous Substrates

Institute for Problems of Materials Science National Academy of Sciences of Ukraine
UA-03142, Kiev-142; 3,Krzhizhanovsky Str, Phone: +380 44 424-3228 Fax: +380 44 424-2131, E-mail: v.khranovskyy@ipms.kiev.ua

The structure and morphology features of ZnO thin films, doped by various Ga content (1, 3, 5, 10%) deposited by PEMOCVD on monocrystalline and amorphous substrates were investigated. The possibility of transparent conductive films with perfect morphological characteristics obtaining on cheap glass substrates was reported. The effect of preferred orientation change from (002) to (101) for monocrystalline substrate and improvement of the structural quality for films on amorphous substrate with Ga content increasing was revealed. The general feature for Ga as dopant to decrease the roughness of deposited ZnO films was reported. The minimal roughness was 2.3 nm at 10% of Ga dopant for ZnO films deposited on monocrystalline substrate and 1.8 nm at 5% of Ga for films on amorphous substrate. Such properties of Ga as dopant are useful for application of Ga doped ZnO films as transparent conductive layers, transparent electrodes for solar cells and optoelectronic devices.

R.I. Bihun, Z.V. Stasyuk

The Transition from Quantum to Classical Charge Transport in Thin Cu Films

‘Ivan Franko’ Lviv National University
50, Dragomanova Str., Lviv, 79005, Ukraine

Under ultrahigh vacuum condition the electrical conductivity of thin copper films was investigated. The resistivity dependencies on thin film’s thickness were explained within the framework of Quantum and Classical size-effect theories. It was shown that subatom Sb layers hastened copper film metallization.

B.P. Yatshyshyn

Optical and Electrical Properties of Thin Film Structures Based on Germanium and REM

Lviv Commercial Academy,
9, Samchuk Str., 79008, Lviv, phone. (0322) 797-627, Е-mail:ecofizbo@lac.lviv.ua

The temperature dependences of the conductivity, temperature and kinetics of amorphous-crystalline transformation have been studied in rare-earth(Y, La, Sc) – transition metal (Fe)– semiconductor (Ge) thin filmsygen.

O.V. Lyapina, A.I. Costrgitsciy

Influence of heat Treatment on Electro-Physical Properties of the Condensed Films Connections of Copper

Odessa national academy of food technologies
voul. Rope, 112, Odessa, 65039, (0482) 29-11-31, E-mail:profAIK@ipss.net

Trained electro-parameters of the condensed tapes of connections of Cu-Sn, Cu-Sn-Al and Cu-Sn-Ni different compositions and influencing of temperature on their change. It is shown, that maximal instability of electro-parameters of svigenapilenih tapes of prihoditsya on the range of compositions 38...55% Sn (on mass). Vidpalennya, that evens, stabilizes the value of specific resistance and TCS in the wide range of compositions. Recommendations are given from the use of findings during optimization of technological parameters of receipt of tapes with the set operating descriptions.

Y.P. Saliy, I.M. Freik

Computer Simulation of Ion Clasters and Them Defects

‘Vasyl Stefanyk’ Precarpatian National University, Chair of Physics and Chemistry of Solid,
201 Galytska Str., Ivano-Frankivsk, UA-76008, Ukraine, E-mail:freik@pu.if.ua

In this paper, we describe the application of the static method to the study of the formation and stability of little ion clusters. The results show the existence of stable clasters having one ion with the charge opposite to charges of all another ions. This one ion is central in the claster. It is shown that the value of the central ion charge influences on the coordinate polyhedron created by another ions. The stability of this configurations is studied on the type and value of the pushed part of the central potential of the ions interection.
The influence of the central interatomic potential on formation of the stable structure: NaCl and BaF₂ has been investigated. The type of structures produced depends on the charge of the central ion and initial concentration of ions.

ІI.F. Muronyuk, V.L. Chelyadyn, B.K. Ostafiychuk, I.M. Budzulyak, I.I. Grigorchak*, V.O. Kotsyubynsky, A.Yu. Pidluzna*, M.M. Mizov*

Electrochemical intercalation of lithium ions to the synthetic magnesium silicate

Precarpathion National University named after V. Stefanyk,
57, Shevchenko Str., Ivano-Frankivsk, 76025, Ukraine E-mail:chvlchem@rambler.ru, phone: +(0342) 59-60-75
*National University “Lvivska Polithechnika”,
12, Bandery Str., Lviv, 79013, Ukraine, E-mail:ivangr@rambler.ru, phone: +(032) 258-22-67

The synthetic silicate of magnesium with the size of particles 40-300 nm and specific surface of 344 m²/g was got by method of besieging. Electrochemical lithium intercalation processes of given material were researched. The «guest» loading degree of x = 4 that indicates possiblity of its using as cathode material for the high-effective lithium-ion electric energy source.

V.F. Zinchenko₁, O.G. Eryomin₁, Ye.V. Timukhin₁, N.P. Efryushina₁, O.V. Mozkova₂, N.M. Belyavina₃

Thin-film coatings on the base of complex RE fluorides

¹A. V. Bogatsky Physico-Chemical Institute of NAS of Ukraine,
86 Lustdorfska Doroga Str., 65080, Оdesа, Ukraine; E-mail:vfzinchenko@ukr.net
²"Аrsenal" Central Design Office,
8, Moscovska Street, 02010, Kyiv, Ukraineб E-mail:borisgor@i.com.ua
³Taras Shevchenko Kyiv National University,
64, Volodymyrska Street, 01003, Kyiv, Ukraine; E-mail:belmar@mail.univ.kiev.ua

The effect of donor-acceptor interaction between Magnezium, Aluminium, Hafnium and RE (Sc, Ce, Eu, Yb) fluorides in various valence states on the character of processes of the thermal evaporation in vacuum and formation of thin films has been established. Addition of EuF₃ promotes extra fluoridation of the residues of oxide phases in MgF₂ and HfF₄, which enables a sufficient improvement of the optical and operational properties of thin - film coatings. Some coatings reveal a noticeable content of amorphous component.

D. Freik, А. Dmytriv, L. Mezhylovska, P. Zukowski*

The Features of Cd_1-xZn_xTe, Cd_1-xMn_xTe Crystals Defect Subsystem

Vasyl Stefanyk’ Prekarpathian University,
201, Galytska Str., Ivano-Frankivsk, 76000, Ukraine, E-mail:freik@pu.if.ua
*Lyubli Technical University, 20-618 Lyublin, Poland, E-mail:mario@elektron.pol.lublin.pl

There are proposed the mechanisms of formation of the n-Cd_1-xZn_xTe, p-Cd_1-xMn_xTe solid solutions on the base of crystal-quasichemistry methods. The both concentration of the point defects and charge carriers are calculated.

I.P. Hlushyk¹, O.I. Aksimentyeva², P.Yu. Stakhira¹, A.V. Fechan¹, V.V. Cherpak¹

Electrical Processes on Electrical Conductive Polyaminoarenes on Proton Electrolytes

¹Lviv Polytechnics National University,
12 Bandera-St. Lviv,79013,Ukraine tel: (032) 258-26-03, E-mail:stakhira@polynet.lviv.ua,
²Lviv Ivan Franko National University,
8 Kyryla-Mefodia, 79005, Lviv, Ukraine, E-mail:aksimen@org.lviv.ua

The optical, structural and charge transport characteristics of polyaminoarenes, such as polyaniline, obtained on optical transparent SnO2 electrodes by electrochemical polymerization method, were investigated. The influence of protonated electrolytes natures and concentration on absorption spectrums and effective charge transfer coefficient of polymer layers were carried out. The polyaniline films have stable optical response and can be used as sensitive elements of pH sensors with optical information transfer channels was determinated.

V.V. Kosyak, A.S. Opanasyuk

АThe point defects ensemble in CdTe undoped single-crystals in cases full equilibrium and quenching

Sumy State University,
2, Rimskyi-Korsakov str., 4007, Sumy, Ukraine, E-mail:opanasyuk@ua.fm, v_kosyak@ukr.net

On the basis of conventional and the latest knowledge of the nature of native defects in the material, we carried out modelling of the point defects ensemble in CdTe undoped single-crystals. Two extreme cases were calculated: full equilibrium and quenching. One defined the point defects and free carrier concentration function of technological parameters of growing and after-grow annealing in Cd vapour and observation temperature. The achieved results have been compared with experimental data. This made it possible to make conclusions concerning validity of the studied models and offer additional experiments to make final choice between them.

L.G. Il’chenko, V.V. Lobanov, А.А. Chuiko

The Potential Barrier Formation between Two Close Separated Metals with the Adsorbed Submonolayers Coatings

Institute of Surface Chemistry NAS of Ukraine,
Generala Naumova Street 17, Kiev 03164, E-mail:vai@rpd.univ.kiev.ua

In this article in the framework of nonlocal electrostatics the charged ΔV_(x) and the structured ΔV_st(r) component of the full potential in the vacuum gap between two close spaced metals is calculated theoretically. The structured potential ΔV_st(r) is determined by the microscopic (atomic) structures of the metal surfaces with the submonolayers of the adsorbed coatings. It was shown that for the small vacuum intervals L ~ 0,3-2 нм the accounting of the structure component ΔV_st(r) of the full potential determines the lateral change of the potential barrier height in the all vacuum interval.

S.A. Kurta, I.M. Mykytyn, M.V. Haber

The Granulometric Researches of the Catalyst Oxidizing Chlorinating of the Ethylene

Vasyl Stefanyk Precarpathian University, Chair of chemistry,
the B. Hmelnyckogo Str, 57, 77300 Kalush, Ukraine; 4-21-04, E-mail:kca@arte-fact.net, mib80@mail.ru

The investigation of the quality change of the catalyst oxidizing chlorinating of the ethylene is conducted by the microscopic methods of analysis. The row of experimental information is got the supervisions under the microscope of the catalyst in the transmitted and the reflected light at the increase 70-80. The change of the appearance of the catalyst is exposed during his exploitation. The dynamics of the change of the catalyst composition is shown during of his exploitation.

D.M. Freik, V.V. Prokopiv, I.V. Gorichok

Thermodynamics of Own Atomic Defects in Unimpurities Cadmium Telluride

‘Vasyl Stefanyk’ Prekarpathian University,
57, Shevchenko Str., Ivano-Frankivsk, 76000, Ukraine

By thermodynamics potential the dependence of electron concentration us temperature on CdTe after the annealing on Cd vapor at their maximum pressure are calculated. This calculated was lead to the model of Cd²⁺_i dominant and V²⁺_Te model of dominant. It is find the enthalpy of dominant defect formation us temperature

Н.O. Sirenko¹, L.V. Bazyuk¹, V.P. Svidersky², S.M. Taranenko²

The Dependence of Thermophysical Properties from Temperature for соmposite with many components on the base of the aromatic polyamide

¹‘Vasyl Stefanyk’ Precarpathian National University,
57, Shevchenko Str., Ivano-Frankivsk, 76000, Ukraine,
²Кhmelnytsky National University,
11, Instytutska Str., Hmelnytsky, 29016, Ukraine

Dependence between thermal conductivity and temperature of composite materials based on aromatic polyamide with different fillers is explored.

P.P. Gorbik, R.V. Mazurenko, Yu.O Nikitin., O.O. Chuiko

Physical - mechanical properties surface of composite materials system polychlortrifluoroethylene - silver iodide

Institute of Surface Chemistry NAS of Ukraine
17, General Naumov Str., Kyiv, 03164, Ukraine, E-mail: dvdrusik@ukr.net

The physical - mechanical properties surface of polychlortrifluoroethylene (PHTFE)-disperse silver iodide (AgI) composites have bean investigated by the continuous pressing of an indenter and interference topography. It is shown that modulus of elasticity and microhardness of the composites surface layer differ from the same bulk values properties. The higher filler content in PHTFE-AgI composites leads to increasing index of strength and decreasing creep.

I.M. Chernenko, V.M Duda, K.V. Chasovskyi

Temperature-Frequency Descriptions of Dielectric Permeability of -Phase of the Bi₂O₃ Films

Dnipropetrovsk national university, Dnipropetrovsk, Ukraine

The dielectric properties of -Bi₂O₃ films are investigated in the frequency range 5 Hz-500 kHz in a temperature interval 300-473 K. The dielectric spectra ` , "  show three types of a dispersion. At high-frequency range the films behave as a dielectrics with low losses. Then it follows the frequency range, where the films show high enough dc-conductivity. At low frequencies and high temperatures the dispersion due to charge volum polarization is observed. Obtained results are discussed in frames of presence in -Bi₂O₃ films electronic as well as ionic (oxygen) components of conductivity.

А.N. Nikolenko, А.А. Poznyak

The Theoretical-Plural Model of Structure of One-Direct Fibrils Composite

Ukrainian State Academy of Railway transportation. 61177, Kharkiv-177

Possibilities and ways of statistical description of structure of one-Direct Fibrils Composite are analysed. The proper Theoretical -plural model of structure of such materials is developed and got common correlations, that describe intercommunications between macroscopic that submezoscopical parameters of structure.

H.A. Sirenko, О.V. Кuzyshyn

Wearability of solids with the nanofilms of lubrication materials on their surfaces: assessment of hydrodynamic effects and estimation of films thickness

Vasyl Stefanyk’ Precarpathian National University,
57, Shevchenko Str., Ivano-Frankivsk, 76000, Ukraine

The methods determining of hydrodynamic effects have been researched. Estimation methods of lubrication nanofilms when solids surfaces contact have been considering.