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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Anistratov A. T., Vorobev A. V., Grekhov Y. N., Malyshevskii N. G.
Заглавие : Dark conductivity and photoconductivity of germanium-sillenite crystals doped with aluminum and boron
Место публикации : Fiz. Tverd. Tela. - 1980. - Vol. 22, Is. 6. - P.1865-1867. - ISSN 0367-3294
Примечания : Cited References: 6
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Miagkov V. G., Bykova L. E., Bondarenko G. N., Miagkov F. V.
Заглавие : Solid-phase reaction of aluminum with the hexagonal and cubic phases of cobalt in film systems
Место публикации : Tech. Phys.: AMER INST PHYSICS, 2002. - Vol. 47, Is. 8. - P1049-1052. - ISSN 1063-7842, DOI 10.1134/1.1501689
Примечания : Cited References: 16
Предметные рубрики: HIGH-TEMPERATURE SYNTHESIS
THIN-FILMS
TRANSITION
Аннотация: Solid-phase reactions taking place in Al/beta-Co/MgO(001) and Al/alpha-Co/MgO(001) film systems under conditions of self-propagating high-temperature synthesis (SHS) are investigated. In both systems, SHS products exhibit the single CoAl superstructure, which epitaxially grows on the MgO(001) surface in the Al/beta-Co/MgO(001) structures and has a fine-dispersed disordered structure in the Al/alpha-Co/MgO(001) films. It appears that the difference in the reagent structure has an effect on the energy of activation but does not change the SHS initiation temperature and the temperature at which the initial phase involved in the reaction products nucleates. It is shown that the SHS initiation temperature in the Al/beta-Co/MgO(001) and Al/alpha-Co/MgO(001) systems coincides with the temperature of CoAl superstructure ordering. (C) 2002 MAIK "Nauka / Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vasil'eva I. G., Dovlitova L. S., Zajkovskij V. I., Malakhov V. V., Edel'man I. S., Stepanov A. S., Aleksandrov K. S.
Заглавие : Real composition and structure of manganese ferrite nanoparticles dispersed in the K-Al-B-O glasses
Место публикации : Dokl. Akad. Nauk. - 2005. - Vol. 401, Is. 3. - P.349-352. - ISSN 0869-5652
Ключевые слова (''Своб.индексиров.''): aluminum--boron compounds--ferrite--manganese--nanostructured materials--particles (particulate matter)--structure (composition)--borate glasses--exchange interaction--glass
Аннотация: For the first time the problem of determining real composition and structure of manganese ferrite nanoparticles dispersed borate glasses is solved using differentiating dissolution and high-resolution X-ray electron microscopy techniques. For the first time the nanosize effect of aluminum incorporation in manganese ferrite composition is experimentally shown, thus directly confirming the hypothesis of Al participation in exchange interaction between paramagnetic Fe and Mn ions as diamagnetic diluter.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Gudim I. A., Krylov A. S., Temerov V. L.
Заглавие : Luminescence of yttrium aluminum borate single crystals doped with manganese
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 49, Is. 9. - P1695-1699. - ISSN 1063-7834, DOI 10.1134/S1063783407090156
Примечания : Cited References: 10
Аннотация: The optical absorption and luminescence spectra of single crystals of yttrium aluminum borate YAl3(BO3)(4) doped with manganese ions are measured. It is established that the optical absorption spectra of yttrium aluminum borate single crystals doped with manganese ions are determined primarily by the contribution from the Mn4+ ions. The luminescence spectra of the YAl3(BO3)(4) single crystals doped with manganese exhibit narrow lines attributed to the Mn4+ ions and an extended multiband structure which is associated primarily with the contribution from the Mn2+ ions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Valiev U. V., Gruber J. B., Sardar D. K., Zandi B., Kachur I. S., Mukhammadiev A. K., Piryatinskaya V. G., Sokolov V. Y., Edelman I. S.
Заглавие : Zeeman effect and stark splitting of the electronic states of the rare-earth ion in the paramagnetic terbium garnets Tb3Ga5O12 and Tb3Al5O12
Разночтения заглавия :авие SCOPUS: Zeeman effect and stark splitting of the electronic states of the rare-earth ion in the paramagnetic terbium garnets Tb3Ga 5O12 and Tb3Al5O12
Место публикации : Phys. Solid State. - 2007. - Vol. 49, Is. 1. - P.91-98. - ISSN 1063-7834, DOI 10.1134/S1063783407010167
Примечания : Cited References: 14
Предметные рубрики: YTTRIUM-ALUMINUM-GARNET
SELECTIVE POLARIZED SPECTROSCOPY
CRYSTAL-FIELD ANALYSIS
GALLIUM GARNET
Аннотация: The Zeeman effect in the F-7(6) - D-5(4) absorption band of the Tb3+ ion in the paramagnetic garnets Tb3Ga5O12 and Tb3Al5O12 was Studied. The field dependences of the Zeeman splitting of some absorption lines arc found to exhibit unusual behavior: as the magnetic field increases, the hand splitting decreases rather than increases. Symmetry analysis relates these lines to 4f - 4f electron transitions of the doublet-quasi-doublet or quasi-doublet-doublet type, for which the field dependences of the splitting differ radically from the well-known field dependences of the Zeeman splitting for quasi-doublet-quasi-doublet or quasi-doublet-singlet transitions in a longitudinal magnetic field.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vorotynov A. M., Petrakovskii G. A., Shiyan Ya. G., Bezmaternykh L. N., Temerov V. E., Bovina A. F., Aleshkevych P.
Заглавие : Electron paramagnetic resonance of Mn2+ ions in single crystals of yttrium aluminum borate YAl3(BO3)4
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 49, Is. 3. - P463-466. - ISSN 1063-7834, DOI 10.1134/S1063783407030122
Примечания : Cited References: 11
Предметные рубрики: HUNTITE STRUCTURE
GROWTH
LASER
Аннотация: Single crystals of yttrium aluminum borate YAl3 (BO3)(4) doped with manganese ions are studied using electron paramagnetic resonance spectroscopy. It is shown that manganese ions introduced at low concentrations into the sample predominantly occupy yttrium ion sites in the crystal structure. The shape of the electron paramagnetic resonance spectrum unambiguously indicates that the valence of manganese ions in this case is equal to 2+. The parameters of the spin Hamiltonian of Mn2+, ions in the YAl3(BO3)(4) matrix are determined at room temperature. The magnitude and sign of the fine structure parameter D allow the conclusion that the YAl3(BO3)(4) single crystals doped with manganese ions have a strong crystal field at the yttrium ion sites and L easy-axis anisotropy.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Malakhovskii A. V., Sokolov A. E., Temerov V. L., Bezmaternykh L. N., Sukhachev A. L., Seredkin V. A., Gnatchenko S. L., Kachur I. S., Piryatinskaya V. G.
Заглавие : Polarized absorption spectra and spectroscopic parameters of Tm3+ in the TmAl3(BO3)(4) single crystal
Разночтения заглавия :авие SCOPUS: Polarized absorption spectra and spectroscopic parameters of Tm 3+ in the TmAl3(BO3)4 single crystal
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008. - Vol. 50, Is. 7. - P1287-1293. - ISSN 1063-7834, DOI 10.1134/S1063783408070159
Примечания : Cited References: 36
Предметные рубрики: RARE-EARTH IONS
ELECTRONIC ENERGY LEVELS
DIODE-PUMPED LASER
OPTICAL-ABSORPTION
ALUMINUM GARNET
MU-M
INTENSITIES
FLUORESCENCE
GLASSES
OXIDE
Аннотация: High-optical-quality single crystals of the TmAl3(BO3)(4) compound were synthesized from a solution in the melt. The absorption spectra in the sigma and pi polarizations for the H-3(6) - F-3(4), H-3(6) - H-3(5), H-3(6) - H-3(4), H-3(6) - F-3(3), H-3(6) - F-3(2), H-3(6) - (1)G(4), and H-3(6) - D-1(2) transitions in the Tm3+ ion were recorded at room temperature. The transition intensities were analyzed in the framework of the Judd-Ofelt theory generalized to the case of anisotropic crystals, and the following parameters of the theory were obtained: Omega(2) = 6.14 x 10(-20) cm(2), Omega(4) = 3.09 x 10(-20) cm(2), and Omega(6) = 2.04 x 10(-20) cm(2). The lifetimes and the branching ratios were determined for all possible transitions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrovsky A.S., Bezmaternykh L.N., Bovina A.F., Gudim I.A., Kharlamova S.A., Krylov A.S., Melnikova S.V., Temerov V.Ye.
Заглавие : Unusual Valence States of Manganese Ions in Gadolinium Gallium Aluminum Borate Single Crystals
Место публикации : Известия высших учебных заведений. Физика. - 2008. - Т. 51, № 10/2. - С. 115-119
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bukhtiyarova G. A., Mart'yanov O. N., Yakushkin S. S., Shuvaeva M. A., Bayukov O. A.
Заглавие : State of iron in nanoparticles prepared by impregnation of silica gel and aluminum oxide with FeSO4 solutions
Коллективы :
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2010. - Vol. 52, Is. 4. - P826-837. - ISSN 1063-7834, DOI 10.1134/S1063783410040268
Примечания : Cited References: 27. - This study was supported by the Presidium of the Russian Academy of Sciences within the framework of the Program no. 27 "Principles of Basic Research of Nanotechnologies and Nanomaterials," Project no. 46 "Magnetically Ordered Nanoparticles in Catalytic Systems: Synthesis, Evolution, and Physicochemical Properties."
Предметные рубрики: THERMAL-DECOMPOSITION
BETA-FEOOH
MOSSBAUER
FERRIHYDRITE
EPSILON-FE2O3
FE-2(SO4)(3)
SULFATE
FE-57
Аннотация: The state of iron in nanoparticles prepared by impregnating silica gel and aluminum oxide with iron(II) sulfate solutions has been investigated using Mossbauer spectroscopy. It has been revealed that the state of iron depends on the nature of the support. Iron(III) hydroxysulfate and iron(III) oxysulfate nanoparticles are formed on the surface of silica gel, and iron oxide nanoparticles are formed on the surface of aluminum oxide. An increase in the concentration of iron ions or in the size of iron-containing particles leads to hydration of the nanoparticle surface. The calcination of the samples results in the formation of E -Fe2O3 oxide in a strongly disordered or amorphous state in iron-containing particles on the surface of silica gel.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boldyrev K. N., Popova M. N., Bettinelli M., Temerov V. L., Gudim, Irina A., Bezmaternykh L. N., Loiseau P., Aka G., Leonyuk N. I.
Заглавие : Quality of the rare earth aluminum borate crystals for laser applications, probed by high-resolution spectroscopy of the Yb3+ ion
Место публикации : Opt. Mater.: Elsevier Science BV, 2012. - Vol. 34, Is. 11. - P.1885-1889. - ISSN 0925-3467, DOI 10.1016/j.optmat.2012.05.021
Примечания : Cited References: 20. - This work was supported by the Russian Academy of Sciences under the Programs for Basic Research, the Russian Foundation for Basic research under Grants No 10-02-01071-a and No 09-02-00171-a, and by the Ministry of Education and Science under Grant HIII-4828.2012.2.
Предметные рубрики: GROWTH
Y1-XYBXAL3(BO3)4
LUMINESCENCE
FREQUENCY
CENTERS
Ключевые слова (''Своб.индексиров.''): ytterbium--aluminum borates--impurities--high-resolution spectroscopy--uv edge
Аннотация: A comparative study was performed of the low-temperature high-resolution absorption spectra of the Yb3+ probe in R1−xYbxAl3(BO3)4 (R = Y, Tm, Lu) crystals grown by flux technique independently in four different laboratories using different solvents. We show that the incorporation of solvent components into the crystal in the course of crystallization gives rise to spectral satellites of the Yb3+ 0(2F7/2) → 0′(2F5/2) absorption lines and assign particular satellites to the Yb3+ centers near the bismuth and molybdenum impurities (which decrease the transparency of YAB in the UV spectral range). We suggest this spectroscopic method for a rapid analysis of the quality of UV laser crystals and for improvement of growth technologies.
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