Pub Date : 2014-05-26DOI: 10.1109/OMEE.2014.6912433
Oleg Sidletskiy, A. Gektin, B. Grinyov, Andrei Belsky
Behavior of light yield in wide range of inorganic scintillation crystals formed by isovalent substitution of anions or cations is summarized. The correlations between improvement of light yield in mixed crystals, and the ratios of ionic radii and atomic weights of the substituted atoms, as well as the bandgap difference between the components of mixed crystal, have been analyzed. It is presumed that non-monotonous dependence of light yield on components ratio in mixed scintillators is called by modulation of energy structure and limitation of carrier migration length due to spatial inhomogeneity in crystal. Phenomenological approach to prediction of light yield in mixed scintillation crystals has been proposed.
{"title":"Phenomenological approach to prediction of scintillation yield in mixed crystals","authors":"Oleg Sidletskiy, A. Gektin, B. Grinyov, Andrei Belsky","doi":"10.1109/OMEE.2014.6912433","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912433","url":null,"abstract":"Behavior of light yield in wide range of inorganic scintillation crystals formed by isovalent substitution of anions or cations is summarized. The correlations between improvement of light yield in mixed crystals, and the ratios of ionic radii and atomic weights of the substituted atoms, as well as the bandgap difference between the components of mixed crystal, have been analyzed. It is presumed that non-monotonous dependence of light yield on components ratio in mixed scintillators is called by modulation of energy structure and limitation of carrier migration length due to spatial inhomogeneity in crystal. Phenomenological approach to prediction of light yield in mixed scintillation crystals has been proposed.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130041803","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 : 2014-05-26DOI: 10.1109/OMEE.2014.6912364
T. Plutenko, O. V’yunov, A. G. Belous
The formation of (1-x)BaTiO3-xLi0.5Bi0.5TiO3 (0 ≤ x ≤ 0.6) solid solutions with positive temperature coefficient of resistance (PTCR) effect was studied. Powders were prepared by solid-phase reaction technique. Ceramics were sintered under reducing atmosphere N2/H2 in the temperature range 1200-1450°C with subsequent oxidation in air. It was shown that minimum value of resistivity rises with increase in x value. Complex impedance analysis shown that ceramic grains of (1-x)BaTiO3-xLi0.5Bi0.5TiO3 materials consist of three areas with different electrical properties. Boundaries and outer layers of grains make the main contribution to the PTCR effect in lithium-containing solid solutions. The potential barrier decreases with increasing x.
{"title":"Complex impedance analyses of PTCR ceramics based on barium-lithium-bismuth titanate","authors":"T. Plutenko, O. V’yunov, A. G. Belous","doi":"10.1109/OMEE.2014.6912364","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912364","url":null,"abstract":"The formation of (1-x)BaTiO<sub>3</sub>-xLi<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> (0 ≤ x ≤ 0.6) solid solutions with positive temperature coefficient of resistance (PTCR) effect was studied. Powders were prepared by solid-phase reaction technique. Ceramics were sintered under reducing atmosphere N<sub>2</sub>/H<sub>2</sub> in the temperature range 1200-1450°C with subsequent oxidation in air. It was shown that minimum value of resistivity rises with increase in x value. Complex impedance analysis shown that ceramic grains of (1-x)BaTiO<sub>3</sub>-xLi<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> materials consist of three areas with different electrical properties. Boundaries and outer layers of grains make the main contribution to the PTCR effect in lithium-containing solid solutions. The potential barrier decreases with increasing x.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130692301","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 : 2014-05-26DOI: 10.1109/OMEE.2014.6912380
P. Arhipov, S. Tkachenko, M. Biatov, S. Vasyukov, O. Sidletskiy
The influence of technological operations on the optical properties of YAG crystals grown from melt using Mo crucibles is evaluated and compared to YAG grown from Ir crucibles. It is shown that optimization of post-growth annealing procedure of YAG grown in Mo crucible provides the optical transmission comparable to the counterpart grown from Ir crucible. The features of absorption spectra of the as-grown (AsG) YAG crystals, grown from Mo crucible are analyzed and compared to the literature.
{"title":"Obtaining of optically perfect YAG crystals grown from Mo crucibles","authors":"P. Arhipov, S. Tkachenko, M. Biatov, S. Vasyukov, O. Sidletskiy","doi":"10.1109/OMEE.2014.6912380","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912380","url":null,"abstract":"The influence of technological operations on the optical properties of YAG crystals grown from melt using Mo crucibles is evaluated and compared to YAG grown from Ir crucibles. It is shown that optimization of post-growth annealing procedure of YAG grown in Mo crucible provides the optical transmission comparable to the counterpart grown from Ir crucible. The features of absorption spectra of the as-grown (AsG) YAG crystals, grown from Mo crucible are analyzed and compared to the literature.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130714569","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 : 2014-05-26DOI: 10.1109/OMEE.2014.6912378
K. Terebilenko, N. Suharevska, Y. Hizhnyi, S. Nedilko, V. Chornii, N. Slobodyanik
The conditions of synthesis and luminescence characteristics of composites Al2O3:Cr3+/NaAl(MoO4)2:Cr3+ obtained from molybdate high-temperature solutions have been studied. The influence of the impurity Cr3+ ions on crystallization regions in the molten system Na-Al-Mo-O has been detected as a key factor of composite formation. The luminescence emission spectra of the composite exhibit two narrow lines at 692 nm (Al2O3:Cr3+) and 740.5 nm (NaAl(MoO4)2:Cr3+), which indicates that both components of the composite are doped with chromium.
{"title":"Synthesis and luminescence of Cr(III)-doped aluminum oxide/molybdate composites","authors":"K. Terebilenko, N. Suharevska, Y. Hizhnyi, S. Nedilko, V. Chornii, N. Slobodyanik","doi":"10.1109/OMEE.2014.6912378","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912378","url":null,"abstract":"The conditions of synthesis and luminescence characteristics of composites Al<sub>2</sub>O<sub>3</sub>:Cr<sup>3+</sup>/NaAl(MoO<sub>4</sub>)<sub>2</sub>:Cr<sup>3+</sup> obtained from molybdate high-temperature solutions have been studied. The influence of the impurity Cr<sup>3+</sup> ions on crystallization regions in the molten system Na-Al-Mo-O has been detected as a key factor of composite formation. The luminescence emission spectra of the composite exhibit two narrow lines at 692 nm (Al<sub>2</sub>O<sub>3</sub>:Cr<sup>3+</sup>) and 740.5 nm (NaAl(MoO<sub>4</sub>)<sub>2</sub>:Cr<sup>3+</sup>), which indicates that both components of the composite are doped with chromium.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126254058","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 : 2014-05-26DOI: 10.1109/OMEE.2014.6912323
V. Sokol, V. Shulgov
The heat resistance study of anodic alumina layers made by the open circuit potential measurements and electron microscopy is presented. The crack growth resistance of the anodic alumina layers depending on the initial aluminum alloy composition and the anodization regimes are discussed.
{"title":"Investigation of heat resistance of anodic layers on aluminum alloys","authors":"V. Sokol, V. Shulgov","doi":"10.1109/OMEE.2014.6912323","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912323","url":null,"abstract":"The heat resistance study of anodic alumina layers made by the open circuit potential measurements and electron microscopy is presented. The crack growth resistance of the anodic alumina layers depending on the initial aluminum alloy composition and the anodization regimes are discussed.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116100921","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 : 2014-05-26DOI: 10.1109/OMEE.2014.6912417
V. N. Berzhansk, A. Karavainikov, T. Mikhailova, A. Prokopov, A. Shaposhnikov, M. F. Kharchenko, Lm Lukienko, O. Miloslavskaya, Y. Kharchenko
The low-temperature behavior of optical and magneto-optical properties of microcavity 1D-MPCs with different composition of substituted YIG films as defect layers were investigated. It is found that optical transmittance of 1D-MPCs was temperature independent and 1D-MPC with Bi, Gd, and Al-substituted YIG films had compensation temperature of Faraday rotation ≈ 30 K.
{"title":"Temperature dependence of Faraday rotation in microcavity 1D-MPC with compensation temperature","authors":"V. N. Berzhansk, A. Karavainikov, T. Mikhailova, A. Prokopov, A. Shaposhnikov, M. F. Kharchenko, Lm Lukienko, O. Miloslavskaya, Y. Kharchenko","doi":"10.1109/OMEE.2014.6912417","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912417","url":null,"abstract":"The low-temperature behavior of optical and magneto-optical properties of microcavity 1D-MPCs with different composition of substituted YIG films as defect layers were investigated. It is found that optical transmittance of 1D-MPCs was temperature independent and 1D-MPC with Bi, Gd, and Al-substituted YIG films had compensation temperature of Faraday rotation ≈ 30 K.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131174105","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 : 2014-05-26DOI: 10.1109/OMEE.2014.6912335
N. Ftomyn, Y. Shopa, I. Sokolyuk
The polarizability theory of optical activity is used to investigate the crystal structure peculiarities of disordered langasite family crystals. An optical rotation was calculated as the function of site occupancy of mixed 1a, 2d and 3f Wickoff position for various Ca-gallogermanate structure type crystals.
{"title":"Disorder of crystal structure and optical activity of langasite family crystals","authors":"N. Ftomyn, Y. Shopa, I. Sokolyuk","doi":"10.1109/OMEE.2014.6912335","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912335","url":null,"abstract":"The polarizability theory of optical activity is used to investigate the crystal structure peculiarities of disordered langasite family crystals. An optical rotation was calculated as the function of site occupancy of mixed 1a, 2d and 3f Wickoff position for various Ca-gallogermanate structure type crystals.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121272962","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 : 2014-05-26DOI: 10.1109/OMEE.2014.6912377
A. Krasnikov, L. Lipińska, T. Shalapska, A. Suchocki, S. Zazubovich, Y. Zhydachevskii
Time-resolved emission and excitation spectra as well as luminescence decay kinetics are studied at 4.2-400 K under excitation in the 3-6 eV energy range for Bi3+ ions substituting for Y3+ ions in four nonequivalent crystal lattice sites of Y4Al2O9:Bi ceramics. The dependences of the luminescence characteristics and the relaxed excited state structure of Bi3+centers on their nearest surroundings are discussed.
{"title":"Time-resolved spectroscopy of Bi3+ Centers in Y4Al2O9 ceramics","authors":"A. Krasnikov, L. Lipińska, T. Shalapska, A. Suchocki, S. Zazubovich, Y. Zhydachevskii","doi":"10.1109/OMEE.2014.6912377","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912377","url":null,"abstract":"Time-resolved emission and excitation spectra as well as luminescence decay kinetics are studied at 4.2-400 K under excitation in the 3-6 eV energy range for Bi<sup>3+</sup> ions substituting for Y<sup>3+</sup> ions in four nonequivalent crystal lattice sites of Y<sub>4</sub>Al<sub>2</sub>O<sub>9</sub>:Bi ceramics. The dependences of the luminescence characteristics and the relaxed excited state structure of Bi<sup>3+</sup>centers on their nearest surroundings are discussed.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115625670","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 : 2014-05-26DOI: 10.1109/OMEE.2014.6912352
S. Ubizskii, O. Buryy, L. Pavlyk, I. Syvorotka, O. Kravchuk, R. Savytskyy, P. Demchenko, S. Navrotskyi, N. Mitina, O. Zaichenko
The new method of the nanoparticle log-normal distribution parameters determination for superparamagnetic nanoparticle system of core-shell type is proposed. It is based on measurements of the nonlinear magnetic susceptibility and is compared with other commonly used techniques.
{"title":"Determination of superparamagnetic nanoparticles size distribution from magnetic measurements","authors":"S. Ubizskii, O. Buryy, L. Pavlyk, I. Syvorotka, O. Kravchuk, R. Savytskyy, P. Demchenko, S. Navrotskyi, N. Mitina, O. Zaichenko","doi":"10.1109/OMEE.2014.6912352","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912352","url":null,"abstract":"The new method of the nanoparticle log-normal distribution parameters determination for superparamagnetic nanoparticle system of core-shell type is proposed. It is based on measurements of the nonlinear magnetic susceptibility and is compared with other commonly used techniques.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124496588","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 : 2014-05-26DOI: 10.1109/OMEE.2014.6912426
O. Tychko
Photoinduced nucleation in external magnetic field is investigated. A possibility of weak magnetic field strength measurement is showed.
研究了外加磁场下的光致成核现象。指出了弱磁场强度测量的可能性。
{"title":"Magnetooptical medium with photomagnetic properties as week magnetic field sensor","authors":"O. Tychko","doi":"10.1109/OMEE.2014.6912426","DOIUrl":"https://doi.org/10.1109/OMEE.2014.6912426","url":null,"abstract":"Photoinduced nucleation in external magnetic field is investigated. A possibility of weak magnetic field strength measurement is showed.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124979411","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：