< Journal Physics and Chemistry of Solid State (Volume 3, Number 2, English version

2002   Volume 3   N 2

Abstracts


J.M. Bondarchouk, J.O. Dovgyy1

Theoretical and Technological Aspects of Synthesis of Laser Mirrors
(Review)

LTD Lviv-Electronica,
14a, Ugorsk Str.,. Lviv, 79619, tel.(fax) 0322-70-14-82, E-mail:bond@org.lviv.net
1Ivan Franko Lviv National University,
1, Universytetska Str., 79602, tel. 0322-964-433


In the publication the analysis of a modern status of development of optics of gas lasers is given. The features of designs of industrial lasers and elements, used in them, of optical resonators are analyzed. Is shown, that use of selective mirrors essentially improves the basic parameters of lasers. The methods of synthesis of thin-film optical coverings are analyzed. The concrete examples of designing of selective mirrors of lasers are resulted.




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D.M. Freik, L.I. Nykyruy, V.V. Nyzhnykevych1

Electron-Phonon Scattering on n-Types of Lead Chalkogenides Crystals

Physics-Chemical Institute at the Vasyl Stefanyk Precarpathian University,
57, Shevchenko St., 76000, Ivano-Frankivsk , E-mail:
liubomyr@pu.if.ua
1Ivano-Frankivsk National Technical University of Oil and Gas,
15, Karpatska St., Ivano-Frankivsk, 76000


The theoretical analysis of scattering carriers of current on thermal oscillations of crystalline lattice is conducted. The account of mobility of carriers in wide temperature (4,2-300 ) and concentration (1016-1020 sm-3) ranges from the account of interaction of electrons conductivity with deformations potentials both of acoustic and optical phonons and with a polarizing potential of optical phonons is executed. Is shown, that the precise coordination of theoretical and experimental results has a place for want of complex account of current scattering both on phonons, and on ionized vacancies. For crystals of lead chalkogenides such as conductivity in the field of low concentration the scattering on optical polar phonons (for want of 77 and 300 ) predominates, in the field of high concentration on deformation potential of optical phonons (at the temperature of 300 ).




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O.D. Smiyan

Atomic Mechanism of Interaction of an Environment Material with Deformed Metal

E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Bozhenko Str, Kyiv, 03150, Ukraine, tel/fax: (380 44) 227-23-66


The mechanism and conditions of atom-by-atom splitting of molecules of a deformation environment material into individual components migrating deep into metal are suggested. The process occurs at the "environment-deformed solid" interface due to a new physical phenomenon (atom-by-atom splitting of environment material molecules by dislocation ASED) discovered. The latter is confirmed by direct experimental measurements made by local mass spectrometry using a laser probe and by Auger spectrometry on a number of steels, metals and alloys deformed in environments of a different aggregate state and with a different chemical composition.




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O.N. Yurchenko, I.D. Olexeyuk, S.A. Pyroha

nvestigation of Phonon Spectra of the CdI2 Single Crystals Non-doped and Doped by CuI Using Inelastic Scattering of Thermal Neutrons

Department of General and Inorganic Chemistry,
Volyn State University, 13,Voli Av., Lutsk, 43025 Ukraine, E-mail:
yurchenko@lab.univer.lutsk.ua



The dispersion of longitudinal acoustic phonon modes in the CdI2 single crystals non-doped and doped by CuI was investigated by the method of inelastic scattering of thermal neutrons. Using dispersion relations, Acoustic speed for highsimmetrical directions in a Brillouin zone (BZ) was calculated. The charge state of the copper impurity centers substantially determines dispersion dependence of longitudinal acoustic phonon modes along of some highsimmetrical directions in BZ in single crystals CdI2: in the charge state Cu+ the impurity centers consolidate, while in the state Cu2+ - loosen bonds in a layer.




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A.G. Khandozhko1, V.V. Slynko2, E.I. Slynko2

Knight shift and band structure of PbTe and SnTe

1Chernivts National University, Radiotechn. Dept,
58012, Chernivtsi, 2, Kotsyubynskiy Str. tel. (03722) 4-24-36, E-mail:
rmd@chnu.cv.u,
2Chernivtsi Department of Institute of Material Sceince Problems NAS Ukraine,
58001, Chernivtsi, 5, 1. Vilde Str., tel. (03722) 2-51-55, E-mail: chimsp@unicom.cv.ua, -mail: chimsp@unicom.cv.ua


The results of Knight shift investigations on 207Pb nuclei in both n- and -type PbTe and on 119Sn in p-SnTe in the wide region of charge carrier concentrations (61016-3,61021 sm-3) are presented. In samples of p-PbTe the Knight shift is diamagnetic in the interval 61016 < < 61019 sm-3. At ~ 21019 sm-3 D reaches maximal value, and at ~ 61019 sm-3 an inversion of the D sign takes place. In n-PbTe the Knight shift is paramagnetic in all interval of concentrations. And at n ~ 21019 sm-3 the leap of D is observed (~60 G). In SnTe the shift font face="Symbol">D is only paramagnetic. It is established, that the breaks on nonmonotonic dependence font face="Symbol">D() correspond to critical points in the band spectrum of SnTe. The applicability of existing models of hole spectrum for an explanation of Knight shift in PbTe is considered.




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I.M. Bordun1, M.M. Micov, K.D. Tovstyuk

The Process Dehydratation Modelling of Nickel Oxalate

1National University Lvivska Polytechnika,
8, Bandery Str., Lviv, 79000, tel. 39-87-66, E-mail:
bordun@wups.lviv.ua
Lviv dept. Current Sources of Institute of Material Science Problems, 1, Paton Str., Lviv


The process of nickel oxalate dihydrate NiC2O42H2O dehydratation modeled by diffusion mechanism. Activation energy of dehydratation reaction Du = 18,05 kcal/mol was calculated. The good agreement of Du magnitudes which was obtained in different atmospheras and by different methods was showed.




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Z.K. Vlasenko, P.O. Mozol

Coordinate Distribution of Photosensitivity in Inhomogeneous on Their Doping Level of a n-Type Solid Solutions CdxHg1-xTe

Institute of Semiconductor Physics,
45, Nauky Av., 03028 Kyiv, 265 65 02, E-mail:
zvlas@isp.kiev.ua


In CdxHg1-xTe (CMT) crystals ( ~ 0) of n-type conduntivity with fluctuations of the doping level the inhomogeneity of coordinate distribution of photosensitivity is revealed. It is shown that at domination of the process of band-to-band impact recombination, the presence of recombination barriers caused by fluctuations of carriers concentration changes absolute values of lifetimes in a matrix and inclusions. Nevertheless, photoactivity of such inclusions are kept: overdoped inclusions remain recombinatively active and carry out a role of sinks for nonequilibrium charge carriers, while overcompensated inclusions - are injectively active and carry out a role of sources for nonequilibrium charge carriers at optical excitation of inhomogeneous crystals. When transiting into the temperature range of intrinsic conductivity, the coordinate relief in distribution of a photoconductivity is levelled at the expense of charge carriers concentration alignment along the sample.




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V.D. Alexandrov, P.I. Ignatenko1, I.V. Selskaya, S.A. Frolova

Correlation Effects of Crystallisations Parameters and Morphology of Crystals in Selenium Films

Donbas State Academy of construction and architecture,
2, Derzhavna Str., Makiivka-23, Donetsk region, 86023, Ukraine, 86123, (0622) 97-03-41,
1Donetsk National University,
24, University Str., Donetsk, 83055, Ukraine, (0622) 999-767


By both crystallography and lighting of diffraction electronic microscopy methods are investigated crystallization kinetics and morphology of germs in selenium films. The established correlation of dependence of velocity of crystalline formation from temperature and dependence it of morphological parameters from temperature, which confirm close connection of process origin and structures of actual germs.




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I.V. Gutsul, A.A. Ashcheulov, V.I. Gutsul

The Investigation of Volt-Watt Sensitivity of Anisotropic Optic Thermoelement at Temperature-Controlled Side Facet

Yriy Fedkovych Chernivtsy State University,
2, Kotsubynskyy St., Chernivtsy, 58012, Ukraine, tel. (037-22) 4-43-19, E-mail:
ss-dpt@chnu.cv.ua


The calculation of two dimensional temperature distribution for anisotropic optic thermoelement (AOT) taking into account the temperature-controlled side facet was carried out. The expression of cross thermo-electromotive force was obtained and volt-watt sensitivity of AOT for cases of optical carrying and surface absorption.




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B.M. Ruvinskii

The Profile of the Carrier Distribution in Polycrystalline PbS Films under the Annealing with Oxygen Absorption

Vasyl Stefanyk Precarpathian University,
57, Shevchenko Str., Ivano-Frankivsk, 76000 E-mail:
ruvinsky@pu.if.ua


The space-time distribution of the carrier concentration in the polycrystalline textured PbS films of the n-type under the annealing with oxygen absorption was determined. A possibility of the formation of two-layer p-n structure because of oxygen diffusion was established. The results of calculation are in agreement with the experimental data.




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N.. Popovych, .. Dovgoshey, .. Kacher

Influence of Laser Processing to Optical Properties of Tiogalat Zinc Thin Films

Uzhgorod National University,
46, Pidgirna St., Uzhgorod, 88000, E-mail:
pmm@univ.uzhgorod.ua


The indicated results of research of optical properties of recordings tiogalat zinc ZnGa2S4, obtained impulse laser raising, and influence on them of laser exposure. Is obtained, that the thin films ZnGa2S4 are proof to operation of laser radiation with denseness of power 104-106 J/m2. In an result of operation by laser radiation of such potency an optical passage, form and the position of edge of absorption of researched recordings is not changed. Significance of refraction parameter will increase to n = 2,38, that testifies to reduction in the order of crystalline structure of researched recordings owing to operation by laser radiation.




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. Babich, O. Nakonechna, I. Plyushchay, M. Zakharenko

Correlation Between the Electronic Structure and Thermostability of the Fe-Based Soft Magnetic Glasses

Department of Physics, Taras Shevchenko National University,
64, Volodymyrska Str., 01033, Kyiv, Ukraine Tel.: 380 44-266-23-35
E-mail:
zakharenko@mail.univ.kiev.ua


The temperature dependencies of magnetic susceptibility k(T) for amorphous Fe85B15-based alloys with Co and Cr dopants have been investigated in the range of 300-850 K using the Faraday technique. The crystallisation of the studied amorphous alloys is accompanied by an essential increasing of k. Co and Cr dopants were shown to increase the temperature range of amorphous state stability in Fe85B15-based soft magnetic glasses. The computer simulation of the electronic states density n(E) of Fe85B15 amorphous alloy displayed that the Fermi level is located in the vicinity of local maximum of n(E) curve. Co and Cr dopants were shown to decrease n(E) at the Fermi level. The comparison of the experimental k(T) curves and the data of electronic structure simulation proved the applicability of the Nagel-Tauc electronic criterion to describe the thermal stability of the investigated alloys.




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I.I. Patskun, .V. Rybalko

Investigation of Doped and Energy Structure of ZnGeP2 of the Tetragonal Modification

M.P. Dragomanov National Pedagogical University,
9, Pyrygova Str., Kyiv, 01030, tel. 221-99-36


Are investigated impurity and band power structures of crystals ZnGe2 of tetragonal modification. Is obtained, that the position of a long wavelength edge 0,88 answers a distance from valence band, and long wavelength near 0,96 distance of a b-level from bottom of conductivity band. The positions of singularities Van-Khove and their type in valence band and in conductivity band are determined.




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V.V. Prokopiv

Quasychemical Description of Tin Telluride Own Atom Defects

Physics-chemical institute at the Vasyl Stefanyk Precarpathian University,
57, Shevchenko Str., Ivano-Frankivsk, 76000


The offered model of quasychemistry reactions of own atom defects formation in tin telluride crystals with simultaneous existence two-charging defects behind Schottky. On the basis of the analysis of a requirement of an electroneutrality the dependence of defects concentration both carriers of current from temperature and fractional pair pressure of a tellurium is found at embodying of two-temperature annealing. It is specify value equilibrium constants of corresponding reaction.




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B.P. Bakhmatyuk

Thermodynamyc and Kinetic Parameters of Interlayer Lithium Ions Sorption Process of ³2Se3 Crystals

Chernivtsi Branch of the IPM NAS of the Ukraine,
5, I. Vilde str., 58001, Chernivtsi, Ukraine


Analyse phases of Lix³2Se3 and evaluated thermodynamic parameters of interlayer lithium ions sorption process of ³2Se3 crystals by e.m.f. method, with x the range 0 <x < 5. 20 cycles charge/discarge with near 100 % efficiency are obtained in the range 1,25 < x < 3. Evaluated kineti parameters of process has been studied as function of lithium concentration by impedance spectroscopy.




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.M. Gulivets, V.. Zabludovsky, .P. Shtapenko, .. Kushneryov, R.P. Ganych

Magnetic Properties of Co-P Films Obtained by Pulsed Current

Dnipropetrovsk State University
13, Naukova St., Dnipropetrovsk, 49050 (056) 776-90-42 , E-mail:
physmet@ff.dsu.dp.ua


The influence of the program-controlled pulsed current on the structure and magnetic properties of electrodeposited films are studied. Their structure of magnetic properties have been shown to be dependent of phosphors concentration and nonequilibrium of crystallization process caused by pulsed deposition mode. The coercivity and magnetization of saturation of films obtained at great values of magnitude and rate of varying of cathode supersaturation have been found to be higher than 10%.




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T.M. Melnichenko, V.I. Fedelesh, I.M. Jurkin, T.D. Melnichenko, V.M. Rizak

Internal Pressure, Microhardness and Fluidity Limit in the Chalcogenide Glasses

Uzhgorod national university
54,Voloshin str., Uzhgorod, 88015 Ukraine, E-mail:
ipk@univ.uzhgorod.ua


Through the data of elastic constants maximal internal pressure pim is calculated for chalcogenide glasses and fluidity limit s. It was shown, that value of pim not corelates with microhardness H after Vikkers in all of glasses. Fluidity (plastic) limit s more little then microhardness and maximal internal pressure pim. Elastic constants and fluctuation free volume parameters in observed glasses largely depend on mean coordination number Z.




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Ya.P. Salii, I.M. Lishchynskyi, I.I. Perkatyuk

Migration Proces Parameters of Point Defects in n-PbTe Epitaxial Films

Vasyl Stefanyk Prekarpathian University
Shevchenko str., 57, Ivano-Frankivsk, 76000, Ukraine tel.: (380-3422) 59-60-88, fax: (380-3422)3-15-74, E-mail:
igorlim@il.if.ua


n-PbTe . , n- : Pbi VTe, p- VPb.




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I.M. Chernenko, Y.V. Seferovskyy, O.I. Ivon

Receipt Films of Vanadium Oxides by Method of Reactive Deposition

Dnipropetrovsk National University
13, Naukova Str., Dnipropetrovsk E-mail:
licey@creator.dp.ua


In article are represented the job of receipt vanadium oxides by method of reactive magnetron ionic- plasma deposition. We are got the substrate temperature significance, oxygen pressure, current of gas digit for being accorded VO2, V2O5, and being possibility accorded V6O11.




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D.M. Freik, V.M. Boychuk, L.Y. Mezhylovska

The Defects of Crystalline Structure and Doping Mechanisms of Lead Tellurides both by Cobalt and Nickel

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


The methods by crystal quasichemistry describe the probable mechanisms of doping PbTe crystals n- and p-type by transitional elements Co and Ni. Is shown, that donor an operation to dope of impurities associate as with substitution of vacancies in octahedron, and rooting in tetrahedron of hollow dense packing of atoms tellurium of main matrix.




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.. Kapelyukh, P.. Melnyk1

Influence of Chemical and Thermal Processing of the Iron Powder of Plasma Deposition Layer on Strength of Carbon Steel

Ivano-Frankivsk National Technical University of Oil and Gas,
15, Karpatska St., Ivano-Frankivsk, 76000
1Vasyl Stefanyk Precarpathian University, 57, Shevchenko St., 76000, Ivano-Frankivsk


Because of experimental data is shown, that the chemical-thermal processing plasma deposition of a powder of iron essentially influences tiresome strength of carbon steel St. 3.




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Ya.V. Zaulychnyy

Features of an Electronic Structure Metastability of Ultra Dispersible Systems and Materials, Obtained from Them

Institute of Material Science Problems NAS of Ukraine


It has shown general regularity in change of energetic structure of valence electron at disintegration of crystalline to nanofractions and dependence of this changes from type of chemical bound and crystal structure, dependence from method of nano powders consolidation and condencation of carbon films.




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D.M. Freik, L.R. Pavlyuk1, M.. Galuschak1, V.. Boychuk, .. Yatsura

Nuclear defects and electrical properties of epitaxial films PbTe<Te>:In

Vasyl Stefanyk Prekarpathian University, 57, Shevchenko Str., Ivano-Frankivsk, 76000, Ukraine, E-mail: prk@pu.if.ua 1Ivano-Frankivsk National University of the oil and gas, 15, Karpatska Str., Ivano-Frankivsk, 76000, Ukraine


By methods both of crystal-quasichemistry and quasichemistry is analysed the mechanisms of process doping of PbTe films by indium, enriched tellurium. Is established, that the one-charge atoms indium InPb+ The atoms replace of lead in octahedron hollows of tellurium dense packing of PbTe crystalline structure, act by the donors. Is determined constants of an equilibrium and enthalpy of quasichemistry reactions of vacancies of lead [VPb2-] formation and substitution by indium the atom of lead [InPb+].




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R.Ya. Mykhailonka

Thermoelectrial Properties of the Compounds, Bases on Lead, Germanium Bismuth and Stibium

Physics-Chemical Institute at the Vasyl Stefanyk Prekarpathian University
Shevchenko str., 57, Ivano-Frankivsk, 76025, Ukraine


Is investigated the dependence of specific electrical conductivity (s), efficient of thermoelectromotive (a), specific thermal electric power (font face="Symbol">a2s), and efficients of thermal conductivity (k) and thermal electric quality (Z = a2s/k) of the compounds (BixSb1-x)2Te3-GeyPb1-yTe from composition 0,0 < x < 1,0, 0,2 < y < 0,9. Is received the compounds with optimum data of a2s and Z.




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B.I. Bondar, S.I. Yushtchuk, S.O. Yurev, P.I. Yurchyshyn, I.P. Yaremiy1

The Growth of Iron-Yttrium Garnet Epitaxial Films with Inappreciable Magnetic Losses

National University Lvivska Polytechnica,
12, Bandery Str., Lviv
1Institute of Metalophisics named after G.V. Kurdyumova NAS of Ukraine


The influence of composition and mass of fusion mixture for a solute-melt preparation on conditions of growth and quality of iron-yttrium garnet epifilms is investigated. Is shown, that for deriving of a series of nondefected films with a narrow line of a ferromagnetic resonance and stable parameters by a method of a liquid phase epitaxy it is necessary to use a solute - melt of a major mass and to apply their padding stirring during the growth.




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N.K. Kramar, V.M. Kramar, B.M. Nitsovych

Calculations of the Optical Constants of the Layer Semiconductor Crystal PbI2

Chernivtsi National University,
2 Kotsyubinskyy Str., 58012, Chernivtsi, Ukraine


On the base of ab initio pseudopotential method the energy spectra calculations there were obtained the real and imaginary parts of dielectric function of the layer semiconductor PbI2. This allows to calculate optical constants of the crystal, in particular, here absorption and reflectivity.




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S.P. Novosyadlyy, P.. Melnyk

The Carbon in Crystalline Lattice of Monosilicon

Vasyl Stefanyk Precarpathian University,
57, Shevchenko St., Ivano-Frankivsk, 76000


Research of influence of impurity cleusity carbon alloy in silicon on electrophysics parameters of IC structures are perfomed. It is showed that isovalence carbon alloy has significant positive role as in oxidation-diffusion processes so in formation of inner carbon getter and ionic multicharge implantation.




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S.. Logvinkov, G.D. Semchenko, D.. Kobyzeva, L.P. Gurenko

Perspectives of Technological Use Spinodal Phase Disintegration Sapphirine and Cordierite Solid Solutions

National Technical University Kharkiv Polytechnikal Institute
21, Frunze Str., Kharkiv, 61002, Ukraine
E-mail:
Kobyz@kpi.kharkov.ua, Sgd@kpi.kharkov.ua


Is updated reference temperatures of processes phase formation in M-A-S system and updated point of view on a sequence and specifity of their course. The most perspective variants of technological measures are chosen, which realization ensures in materials, which are synthesized, shaping of the raised or non-tradicional combinations of properties.




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D.. Melnyk, .V. Shyychuk

The Choice of Optimal Approximation for Quantum Chemical Calculation of Macromolecules Electron Structure

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


Is investigated, that for quantum mechanical calculations polypropylene macromolecules the optimization of geometry should be carried by a method 3 applying algorithm Pollak-Ribber. For calculation of effective charges on atoms it is expedient to use methods 1 whether 3, which give almost identical distribution of charges. In particular, the method 1 takes into account hydrogen connections, gives rather exact data of energy activation for many responses and calculates heats of molecules formation.




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O. Versta

Magnitudes Effective of Charges of a Circuit Symmetrical and Asymmetrical Polymetyns

Precarpation university of a name V. Stefanyk
76000, Ivano-Frankivsk, Shevchenko str., 57


There was compared quantal-chemical parameters of symmetric and asymmetrical 3-metylchynolinium of dyes received at interaction of quarter salts 3-metyllepidinium with 3-metylphormalinium. New synthesized connections have appeared interesting object for definition them lectronical of a structure. With the help of a method Huckel and program NMO determined effective of charges polymetyn of a circuit and atoms of nitrogen.




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Yu.G. Bachynskyy, P.V. Basistyy, V.V. Fedorov, .G. Medvidj

Influence of Thermal Processing in Hydrogen on Physics-Mechanical Properties of Alloys System Iron - Nickel (up to 36 % Ni)

V. Gnatyuk Ternopilj State Pedagogical University


The objective laws of hydrogens influence on physical (electric resistance, thermo-EDF, density, magnetic induction modulus Ungs) and durability (durability limits and leak limits, plasticity of alloys) systems FeNi with contents of Ni 10, 15, 18, 20, 25, 36 mas.% were determined. It was shown that dissolved hydrogen stimulates the process of moulding regulated structures Fe3Ni and FeNi. It was ascertained that thermal cycling in hydrogen extends the limit of short-term durability of the alloy H18, in change of which two stages are observed. At the first stage (up to 20 thermal cycling) s increases to 6 times, at the second stage (up to 100 thermal cycling) it decreases lower than the starting point with simultaneous 30 % increase of plasticity. It was shown that hydrogenous thermal processing intensifies the process of invar strengthening of H36 alloy.




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V.I. Holota

Matching of Algorithms for Interior Strings Sorting

Vasyl Stefanyk Precarpathian University 57,
Shevchenka Str., Ivano-Frankivsk, 76000 (3422) 59-61-09, E-mail:
kre@pu.if.ua


The realization of the quick algorithm of the internal sorting of character strings with minimal memory is proposed. The sensitivity and quickness of compared algorithms experimentaly are determined for character strings with different order of elements and string size to 100 Mb.




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I.I. Grygorchak

Phenomena of Semiconductor Intercalation Electrician

Institute of Material Problems NAS Ukraine, Lviv Department,
1, Paton St., Lviv, 79000, Ukraine


The phenomena of semiconductor intercalation electrician of crystals Bi2Se3, InSe and GaSe is investigated at different modes of introduction a guest component. Is shown, that magnitude and direction of currents of thermal stimulation discharge, from the sorts of intercalant and it concentration depend on temperature, aspect of a crystalline matrix. Detected photo electrician the condition has permitted to generate nanostructure for generation of a photocurrent from a photo-electromotive power = 1,41 V and use of an accumulated solar energy in lacks of illumination.




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