Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464767
K. Mozul’, L. Ol’khovik, Z. Sizova, O. Shurinova
A magnetic state of real system of biocompatible particles Ca0.5Ba0.5Fe12O19 with a quite wide size distribution within the single domain limit was studied in this paper.
{"title":"Diagram of the magnetic state of real fine particle system of Ca0.5Ba0.5Fe12O19","authors":"K. Mozul’, L. Ol’khovik, Z. Sizova, O. Shurinova","doi":"10.1109/OMEE.2012.6464767","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464767","url":null,"abstract":"A magnetic state of real system of biocompatible particles Ca<inf>0.5</inf>Ba<inf>0.5</inf>Fe<inf>12</inf>O<inf>19</inf> with a quite wide size distribution within the single domain limit was studied in this paper.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"37 1","pages":"278-279"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84530655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464827
A. Senyshyn, R. Ranjan, V. Kothai, A. Daoud-Aladine
The perovskite BiFeO3 has received considerable attention over decades due to its unique combination of ferroelectric and magnetic properties at room temperature. Recently it has been reported that linear magnetoelectric coupling in BiFeO3 can be realized by artificially introduced disorder like in solid solutions, where PbTiO3 substitution causes an antiferromagnetic (AFM) M-H loop. Details of the magnetic and structural order obtained by joint studies using monochromatic high-resolution neutron powder diffraction (NPD) and ultra-high resolution TOF NPD on (1−x)BiFeO3-xPbTiO3 solid solutions (x =0−0.3) have been determined.
{"title":"Structural properties and incommensurate magnetic order in BiFeO3-PbTiO3 solid solutions","authors":"A. Senyshyn, R. Ranjan, V. Kothai, A. Daoud-Aladine","doi":"10.1109/OMEE.2012.6464827","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464827","url":null,"abstract":"The perovskite BiFeO3 has received considerable attention over decades due to its unique combination of ferroelectric and magnetic properties at room temperature. Recently it has been reported that linear magnetoelectric coupling in BiFeO3 can be realized by artificially introduced disorder like in solid solutions, where PbTiO3 substitution causes an antiferromagnetic (AFM) M-H loop. Details of the magnetic and structural order obtained by joint studies using monochromatic high-resolution neutron powder diffraction (NPD) and ultra-high resolution TOF NPD on (1−x)BiFeO3-xPbTiO3 solid solutions (x =0−0.3) have been determined.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"13 1","pages":"91-91"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83040364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464749
V. Adamiv, Y. Burak, I.S. Say, I. Teslyuk, B. Turko, M. Panasyuk
The results of investigations of current-voltage characteristics for metal-dielectric-metal and metal-dielectric-semiconductor-metal structures, where crystalline and glass lithium borates used as dielectrics, are presented.
{"title":"Current-voltage characteristics of MDM and MDSCM structures on basis of lithium borates","authors":"V. Adamiv, Y. Burak, I.S. Say, I. Teslyuk, B. Turko, M. Panasyuk","doi":"10.1109/OMEE.2012.6464749","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464749","url":null,"abstract":"The results of investigations of current-voltage characteristics for metal-dielectric-metal and metal-dielectric-semiconductor-metal structures, where crystalline and glass lithium borates used as dielectrics, are presented.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"9 1","pages":"225-226"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81509261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464903
R. Musiy, S. Khairnasov, I. Semenyuk
It was developed the selective coating by new type for the solar heat collectors. It has been used the carbon-siliceous nanocomposite obtained via sol-gel technology method. The comparative investigations of the obtained coating and the sample of SunSelect firm (Germany) were carried out. The distinctive peculiarity is the preparation of the coating by a high cost technology of the vacuum evaporation. The independent measurements have been done under the irradiation of the natural solar flow of radiation and the simulator of the solar spectrum.
{"title":"Carbon-siliceous nanocomposites via the method of sol-gel technology for selective coatings of solar collectors","authors":"R. Musiy, S. Khairnasov, I. Semenyuk","doi":"10.1109/OMEE.2012.6464903","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464903","url":null,"abstract":"It was developed the selective coating by new type for the solar heat collectors. It has been used the carbon-siliceous nanocomposite obtained via sol-gel technology method. The comparative investigations of the obtained coating and the sample of SunSelect firm (Germany) were carried out. The distinctive peculiarity is the preparation of the coating by a high cost technology of the vacuum evaporation. The independent measurements have been done under the irradiation of the natural solar flow of radiation and the simulator of the solar spectrum.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"77 1","pages":"190-191"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76453376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464779
I. V. Odynets, O. M. Doroshenko, A. A. Babaryk, N. Slobodyanik, S. Khainakov, V. Baumer
The complex sodium-tantalum phosphates (Na2Ta6P4O26, Na3Ta7P4O29, Na4Ta8P4O32) have been synthesized using the flux method in the quasi-quaternary system Na2O-P2O5-Ta2O5-MoO3. These compounds are isostructural with family of sodium-niobium phosphates NaxNb2mP4O6m+8 and tightly related to monophosphate tungsten bronzes (MPTBp) with pentagonal-shaped tunnels. The structure of these phosphates has been investigated by X-ray powder and single crystal diffraction. Their three-dimensional frameworks consist of slabs of corner-shared TaO6 distorted octahedra connected via isolated PO4 tetrahedra and delimit pentagonal tunnels running along c, where Na atoms are located. The solid state band gap measurements gave reasonable prospects for its photocatalytic activity.
{"title":"Synthesis and structural investigations of tantalates phosphates in the flux system Na2O-P2O5-Ta2O5-MoO3","authors":"I. V. Odynets, O. M. Doroshenko, A. A. Babaryk, N. Slobodyanik, S. Khainakov, V. Baumer","doi":"10.1109/OMEE.2012.6464779","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464779","url":null,"abstract":"The complex sodium-tantalum phosphates (Na<inf>2</inf>Ta<inf>6</inf>P<inf>4</inf>O<inf>26</inf>, Na<inf>3</inf>Ta<inf>7</inf>P<inf>4</inf>O<inf>29</inf>, Na<inf>4</inf>Ta<inf>8</inf>P<inf>4</inf>O<inf>32</inf>) have been synthesized using the flux method in the quasi-quaternary system Na<inf>2</inf>O-P<inf>2</inf>O<inf>5</inf>-Ta<inf>2</inf>O<inf>5</inf>-MoO<inf>3</inf>. These compounds are isostructural with family of sodium-niobium phosphates Na<inf>x</inf>Nb<inf>2m</inf>P<inf>4</inf>O<inf>6m+8</inf> and tightly related to monophosphate tungsten bronzes (MPTB<inf>p</inf>) with pentagonal-shaped tunnels. The structure of these phosphates has been investigated by X-ray powder and single crystal diffraction. Their three-dimensional frameworks consist of slabs of corner-shared TaO<inf>6</inf> distorted octahedra connected via isolated PO<inf>4</inf> tetrahedra and delimit pentagonal tunnels running along c, where Na atoms are located. The solid state band gap measurements gave reasonable prospects for its photocatalytic activity.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"43 1","pages":"107-108"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76746789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464900
B. Padlyak, W. Ryba-Romanowski, R. Lisiecki, V. Adamiv, Y. Burak, I. Teslyuk
Optical absorption, luminescence excitation and emission spectra as well as luminescence kinetics of the Nd3+ centres in glasses with Li2B4O7:Nd, LiCaBO3:Nd, and CaB4O7:Nd compositions containing 0.5 and 1.0 mol. % Nd2O3 have been investigated and analyzed. Using Judd-Ofelt theory oscillator strengths (f) and phenomenological intensity parameters Ωt (Ω2, Ω4, and Ω6) for all investigated glasses were determined. Radiative transitions rates (Wr), radiative lifetimes (τrad), and branching ratios (β) for Nd3+ centres have been calculated. Measured lifetimes for Nd3+ centres in the 4F3/2 emitting level are compared with those calculated and quantum efficiency (η) have been estimated.
{"title":"Optical spectroscopy of Nd-doped borate glasses","authors":"B. Padlyak, W. Ryba-Romanowski, R. Lisiecki, V. Adamiv, Y. Burak, I. Teslyuk","doi":"10.1109/OMEE.2012.6464900","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464900","url":null,"abstract":"Optical absorption, luminescence excitation and emission spectra as well as luminescence kinetics of the Nd<sup>3+</sup> centres in glasses with Li<inf>2</inf>B<inf>4</inf>O<inf>7</inf>:Nd, LiCaBO<inf>3</inf>:Nd, and CaB<inf>4</inf>O<inf>7</inf>:Nd compositions containing 0.5 and 1.0 mol. % Nd<inf>2</inf>O<inf>3</inf> have been investigated and analyzed. Using Judd-Ofelt theory oscillator strengths (f) and phenomenological intensity parameters Ω<inf>t</inf> (Ω<inf>2</inf>, Ω<inf>4</inf>, and Ω<inf>6</inf>) for all investigated glasses were determined. Radiative transitions rates (W<inf>r</inf>), radiative lifetimes (τ<inf>rad</inf>), and branching ratios (β) for Nd<sup>3+</sup> centres have been calculated. Measured lifetimes for Nd<sup>3+</sup> centres in the <sup>4</sup>F<inf>3/2</inf> emitting level are compared with those calculated and quantum efficiency (η) have been estimated.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"1 1","pages":"200-201"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75218105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464861
A. Ponomareva, V. Moshnikov
The surface topography of sol-gel deposited SiO2-SnO2 nanocomposite films obtained by using different solvents as well their optical and gas sensing properties were investigated. An approach based on the theory of fractals was used to quantify the nanostructure of sol-gel deposited films. Optical properties were measured in the UV/VIS ranges. Film properties such as Urbach energy and optical energy gap were analyzed. Basic gas sensitive characteristics (sensitivity, response and recovery time) of were derived.
{"title":"Influence of solvents on sol-gel deposited SnO2 gas-sensitive film formation","authors":"A. Ponomareva, V. Moshnikov","doi":"10.1109/OMEE.2012.6464861","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464861","url":null,"abstract":"The surface topography of sol-gel deposited SiO2-SnO2 nanocomposite films obtained by using different solvents as well their optical and gas sensing properties were investigated. An approach based on the theory of fractals was used to quantify the nanostructure of sol-gel deposited films. Optical properties were measured in the UV/VIS ranges. Film properties such as Urbach energy and optical energy gap were analyzed. Basic gas sensitive characteristics (sensitivity, response and recovery time) of were derived.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"83 1","pages":"23-24"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76116969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464804
M. Yukselici, A. Aşıkoğlu, D. Bulut, D. Sugak, I. Solskii, I. Syvorotka, Y. Zhydachevskii, S. Ubizskii, O. Buryy
Research on holographic data storage has been carried out by using continuous wave laser at 632.8. The erasure time constants for continuous readout have been determined. Defect structures of congruent lithium niobate crystal heat-treated at high temperature were identified by optical absorption spectroscopy and the effect of defect bands modified by high temperature heat treatment on the continuous illumination life time of holograms stored in the crystal were studied.
{"title":"The dependence of optical properties of LiNbO3 crystal on the impurity content studied toward the advancement of volume holographic data storage technology","authors":"M. Yukselici, A. Aşıkoğlu, D. Bulut, D. Sugak, I. Solskii, I. Syvorotka, Y. Zhydachevskii, S. Ubizskii, O. Buryy","doi":"10.1109/OMEE.2012.6464804","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464804","url":null,"abstract":"Research on holographic data storage has been carried out by using continuous wave laser at 632.8. The erasure time constants for continuous readout have been determined. Defect structures of congruent lithium niobate crystal heat-treated at high temperature were identified by optical absorption spectroscopy and the effect of defect bands modified by high temperature heat treatment on the continuous illumination life time of holograms stored in the crystal were studied.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"112 6 1","pages":"163-164"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73957478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464814
Ya. O. Dovhyj, I. Man'kovska
The valence-band splitting in a single crystal of CuO has been detected by using the methods of optical spectroscopy. The size of this splitting at the Γ-point of the Brillouin Zone has been determined. Interpretation of this phenomenon taking into account symmetry of the crystal field is given.
{"title":"Influence of the low-symmetry crystal field on the energy states of CuO crystals","authors":"Ya. O. Dovhyj, I. Man'kovska","doi":"10.1109/OMEE.2012.6464814","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464814","url":null,"abstract":"The valence-band splitting in a single crystal of CuO has been detected by using the methods of optical spectroscopy. The size of this splitting at the Γ-point of the Brillouin Zone has been determined. Interpretation of this phenomenon taking into account symmetry of the crystal field is given.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"15 1","pages":"140-141"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74785111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-09-01DOI: 10.1109/OMEE.2012.6464770
L. Pan’kiv, V. Tsmots, I. Pan’kiv, A. Tovstolytkin, A. Matviyenko
The present work aims to study magnetic, electric, magnetoresistance and resonance properties of partially crystallized La0.84Na0.16MnO3 thin films. Peculiar behavior resulting from the wide-range coexistence of highly conductive ferromagnetic and weakly conductive paramagnetic phases has been analyzed. Based on the results of magnetic measurements and theoretical calculations, the dependence of the volume fraction of ferromagnetic phase, VFM, on temperature is calculated. The VFM values whereby electric resistance and magnetoresistance display maxima are determined.
{"title":"Peculiar features of magnetic and resistive transitions in partially crystallized La0.84Na0.16MnO3 films","authors":"L. Pan’kiv, V. Tsmots, I. Pan’kiv, A. Tovstolytkin, A. Matviyenko","doi":"10.1109/OMEE.2012.6464770","DOIUrl":"https://doi.org/10.1109/OMEE.2012.6464770","url":null,"abstract":"The present work aims to study magnetic, electric, magnetoresistance and resonance properties of partially crystallized La0.84Na0.16MnO3 thin films. Peculiar behavior resulting from the wide-range coexistence of highly conductive ferromagnetic and weakly conductive paramagnetic phases has been analyzed. Based on the results of magnetic measurements and theoretical calculations, the dependence of the volume fraction of ferromagnetic phase, VFM, on temperature is calculated. The VFM values whereby electric resistance and magnetoresistance display maxima are determined.","PeriodicalId":6332,"journal":{"name":"2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)","volume":"44 1","pages":"272-273"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80938662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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