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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Romanova O. B., Har'kov A. M., Balaev D. A., Gorev M. V., Vorotynov A. M., Sokolov V. V., Pichugin A.
Заглавие : Metal–semiconductor transition in SmxMn1−xS solid solutions
Место публикации : Phys. Status Solidi B. - 2012. - Vol. 249, Is. 4. - P.812-817. - ISSN 0370-1972, DOI 10.1002/pssb.201147327
Примечания : Cited References: 27. - This study was supported by the Russian Foundation for Basic Research project No 09-02-00554_a; No 09-02-92001-NNS_a; No 11-02-98018 r_sibir_a; ADTP "Development of scientific potential of the higher school" No. 2.1.1/11763.
Предметные рубрики: Magnetic-properties
Phase-transition
SmS
Valence
Pressure
Crystal
Lattice
CeRhSb
Ключевые слова (''Своб.индексиров.''): kondo effect--metal-semiconductor transition--semiconductors--variable-valence elements
Аннотация: The electrical resistivity of the SmxMn1−xS (0.15 ≤ x ≤ 0.25) solid solutions in the temperature range of 80–300 K was measured. Minimum and maximum in the temperature dependence of the resistivity were found, respectively, at T = 220 K for x = 0.15 and at T = 100 K for x = 0.2 compounds. This behavior is explained from the result of the mobility-edge movement, the disorder being due to elastic deformation and spin density fluctuations with short-range order. Metal–semiconductor phase transition versus concentration at xc = 0.25 is observed. Resistivity is described by scattering electrons with acoustic phonon mode and with localized manganese spin. From the thermal expansion coefficient the compression of the lattice below the Néel temperature for Sm0.2Mn0.8S is found.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I., Ikonnikov A. A., Pospelov G. I., Slabko V. V., Zhokhova A. A.
Заглавие : Deep UV generation and fs pulses characterization using strontium tetraborate
Коллективы : Nonlinear Optics and Applications (5; 2011 ; Apr. ; 19-21; Prague, Czech Republic)
Место публикации : Proc. of SPIE: SPIE-Int. Soc. Optical Engineering, 2011. - Vol. 8071. - Ст.80710K. - ISSN 0277-786X, DOI 10.1117/12.886189. - ISSN 978-0-81948-661-5
Примечания : Cited References: 12
Предметные рубрики: CRYSTAL
Ключевые слова (''Своб.индексиров.''): nonlinear photonic crystal--strontium tetraborate--second harmonic generation--random quasi phase matching--ultrafast diagnostics
Аннотация: The properties of NPC structures in strontium tetraborate are analyzed. Different types of NPC structures are revealed that possess different nonlinear properties, and their spectral dependences of frequency conversion efficiency are calculated and compared. Experimental study of these structures is reported for the process of doubling of the second harmonic of fs Ti:S laser. Tuning of generated radiation is obtained in the range 187.5 - 232.5 nm, with extreme insensitivity to the angular orientation of NPC. Behavior of tuning curve along investigated fundamental wave range is similar in all studied samples, but efficiency obtained depends on the type of structure. Conversion efficiency and spectral quality of generated radiation is experimentally shown to grow better when using NPC with improved structure. Prospects of VUV converter on a single NPC are discussed. NPCs of SBO are demonstrated to be useful for autocorrelation diagnostics both in random QPM geometry and in the geometry of nonlinear diffraction from virtual beam.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vasiliev A. D., Zel'bst E. A., Soldatenko A. S., Bolgova Yu.I., Trofimova O. M., Voronkov M. G.
Заглавие : Synthesis and molecular structure of cobalt(II) complex with 1-(1-silatranylmethyl)-1,2,4-triazole
Место публикации : Struct. Chem.: Springer/Plenum Publishers, 2013. - Vol. 24, Is. 4. - P.1001-1005. - ISSN 1040-0400, DOI 10.1007/s11224-012-0121-0
Примечания : Cited References: 24
Предметные рубрики: REACTIVITY
DERIVATIVES
CRYSTAL
SPECTRA
Ключевые слова (''Своб.индексиров.''): complexes--1-(1-silatranylmethyl)-1,2,4-triazole--cobalt dichloride--x-ray diffraction
Аннотация: Reaction of cobalt chloride with 1-(1-silatranylmethyl)-1,2,4-triazole in benzene afforded complex CoCl2 center dot 2L (L = 1-(1-silatranylmethyl)-1,2,4-triazole). It was isolated as the solvate [CoCl2 center dot 2L]center dot CH2Cl2 (1) by recrystallization from dichloromethane and structurally characterized by single-crystal X-ray diffraction. It crystallizes in the monoclinic space group P2(1)/m with a = 6.798(2) E, b = 20.326(5) E, c = 11.005(3) E, and Z = 4. The cobalt atom is in slightly distorted square-planar environment, coordinated to two nitrogen atoms from two ligands and two chloride ions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Cherepakhin A. V., Zaitsev A. I., Aleksandrovsky A. S., Zamkov A. V.
Заглавие : Optical and nonlinear optical properties of orthorhombic BiB3O6
Место публикации : Opt. Mater.: Elsevier Science BV, 2012. - Vol. 34, Is. 5. - P.790-792. - ISSN 0925-3467, DOI 10.1016/j.optmat.2011.11.004
Примечания : Cited References: 13. - The work was supported by Ministry of Education and Science of Russian Federation (Contract 16.740.11.0150), Grant of President of Russian Federation for support of leading scientific schools No. SS-4645.2010.2, Grant No. RNP.2.1.1.3455, Project 3.9.1 of PSB RAS, and Projects No. 27.1 and No. 5 of SB RAS.
Предметные рубрики: BISMUTH BORATE BIB3O6
CRYSTAL
LASER
GENERATION
GROWTH
BIBO
Ключевые слова (''Своб.индексиров.''): orthorhombic bismuth triborate delta-bibo--refractive indices--nonlinear optical coefficients--nonlinear optical materials--phase matching
Аннотация: Dispersion of refraction coefficients of orthorhombic BiB3O6 in the wavelength range between 435.8 and 1060 nm is studied, nonlinear optical coefficients are determined, and phase matching angles, angular and spectral bandwidths for second harmonic generation processes are calculated. delta-BiBO may be suitable for doubling of lasers with a wavelength in the 1.3 mu m region as well as the matrix for self-doubling lasing media. (C) 2011 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Magnetic phase transitions in Nd1−xDyxFe3(BO3)4 ferroborates
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 114, Is. 2. - P.259-272. - ISSN 1063-7761, DOI 10.1134/S1063776111160023
Примечания : Cited References: 29. - This study was supported financially by the President of the Russian Federation (grant no. MK-497.2010.2).
Предметные рубрики: SPIN REORIENTATION
CRYSTAL
DY
ND
Аннотация: The magnetic properties of ferroborate single crystals with substituted compositions Nd1−xDyxFe3(BO3)4 (x = 0.15, 0.25) with competing exchange Nd-Fe and Dy-Fe interactions are investigated. For each composition, we observed a spontaneous spin-reorientation transition from the easy-axis to the easy-plane state and step anomalies on the magnetization curves for the spin-flop transition induced by a magnetic field B | c. The measured parameters and effects are interpreted using a unified theoretical approach based on the molecular field approximation and on calculations performed in the crystal-field model for the rare-earth ion. The experimental temperature dependences of the initial magnetic susceptibility from T = 2 K to T = 300 K, anomalies on the magnetization curves for B | c in fields up to 1.8 T, and their evolution with temperature, as well as temperature and field dependences of magnetization in fields up to 9 T are described. In the interpretation of experimental data, the crystal-field parameters in trigonal symmetry for the rare-earth subsystem are determined, as well as the parameters of Nd-Fe and Dy-Fe exchange interactions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vyunishev A. M., Slabko V. V., Baturin I. S., Akhmatkhanov A. R., Shur V. Y.
Заглавие : Nonlinear Raman-Nath diffraction of femtosecond laser pulses
Коллективы : Russian Federation [MK-250.2013.2]; Krasnoyarsk Regional Fund for Science and Technical Activity Support; RAS grant [24.31]; Ural Federal University Development Program
Место публикации : Opt. Lett.: Optical Society of America, 2014. - Vol. 39, Is. 14. - P.4231-4234. - ISSN 0146-9592, DOI 10.1364/OL.39.004231. - ISSN 1539-4794
Примечания : Cited References: 22. - This work was partially supported by the Grant of the President of the Russian Federation MK-250.2013.2, Krasnoyarsk Regional Fund for Science and Technical Activity Support and by the RAS grant no. 24.31. A. A. acknowledges the financial support of young scientists through the Ural Federal University Development Program. The authors thank A. S. Chirkin and I. V. Timofeev for fruitful discussions and A. V. Barannik for optical microscopy of the samples.
Предметные рубрики: STRONTIUM BARIUM NIOBATE
2nd-HARMONIC GENERATION
PHOTONIC STRUCTURES
DOMAIN-STRUCTURE
LITHIUM-NIOBATE
CRYSTAL
Аннотация: We study the nonlinear Raman–Nath diffraction (NRND) of femtosecond laser pulses in a 1D periodic nonlinear photonic structure. The calculated second-harmonic spectra represent frequency combs for different orders of transverse phase matching. These frequency combs are in close analogy with the well-known spectral Maker fringes observed in single crystals. The spectral intensity of the second harmonic experiences a redshift with a propagation angle, which is opposite the case of Čerenkov nonlinear diffraction. We analyze how NRND is affected by the group-velocity mismatch between fundamental and second-harmonic pulses and by the parameters of the structure. Our experimental results prove the theoretical predictions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Flerov I. N., Gorev M. V., Melnikova S. V., Misyul S. V., Voronov V. N., Aleksandrov K. S.
Заглавие : Phase-transitions in elpasolite Rb2KSCF6
Место публикации : Fiz. Tverd. Tela. - 1992. - Vol. 34, Is. 7. - P.2185-2195. - ISSN 0367-3294
Примечания : Cited References: 24
Предметные рубрики: RB2KMIIIF6 ELPASOLITES
CS2NANDCL6
SCATTERING
RB2NADYF6
CS2RBDYF6
RB2KDYF6
CRYSTAL
MODE
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Trabs, Peter, Noack, Frank, Aleksandrovsky A. S., Zaitsev A. I., Radionov N. V., Petrov V.
Заглавие : Spectral fringes in non-phase-matched SHG and refinement of dispersion relations in the VUV
Место публикации : Opt. Express: Optical Society of America, 2015. - Vol. 23, Is. 8. - P.10091-10096. - ISSN 1094-4087, DOI 10.1364/OE.23.010091
Примечания : Cited References:11
Предметные рубрики: 2ND-HARMONIC GENERATION
CRYSTAL
STRONTIUM
SrB4O7
Аннотация: We consider second harmonic generation (SHG) of ultrashort pulses in the case of strong phase- and group-velocity mismatch. Spectral fringes appear in the second harmonic related to two delayed replicas of the fundamental pulse in the time domain. The fringe separation can be used to evaluate the group-velocity and refractive index of nonlinear crystals at extreme wavelengths. Experimental results with femtosecond pulses in SrB4O7 (SBO) are used to refine the Sellmeier equation describing the nc refractive index down to 160 nm, essential for the use of this unique nonlinear crystal for random quasi-phase-matching in the VUV.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pavlovskii M. S., Shinkorenko A. S., Zinenko V. I.
Заглавие : Calculation of lattice dynamics, elastic and dielectric properties of γ-BiB3O6 and δ-BiB3O6
Коллективы : Council on Grants from the President of the Russian Federation for Support of the "Leading Scientific Schools" [NSh-924.2014.2]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 4. - P.675-682. - ISSN 1063, DOI 10.1134/S1063783415040241. - ISSN 10906460(eISSN)
Примечания : Cited References:14. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of the "Leading Scientific Schools" (grant no. NSh-924.2014.2).
Предметные рубрики: BISMUTH BORATE BiB3O6
OPTICAL-PROPERTIES
CRYSTAL
RAMAN
Аннотация: The crystal lattice vibration frequencies, densities of phonon states, elastic moduli, and high-frequency permittivities have been calculated in terms of the density functional theory method for two polymorphs γ-BiB3O6 and δ-BiB3O6. Based on the calculated densities of phonon states, the temperature dependences of the free energies of two considered bismuth triborate modifications have been constructed, and the temperature of the phase transition between these modifications has been determined (1100 K). The structure of a possible nonpolar praphase of δ-BiB3O6 has been proposed. The polarization of δ-BiB3O6 has been estimated as 131 μC/cm2.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Trabs P., Noack F., Aleksandrovsky A. S., Zaitsev A. I., Petrov V.
Заглавие : Generation of coherent vacuum UV radiation in randomly quasi-phase-matched strontium tetraborate
Коллективы : Conference on Lasers and Electro-Optics
Место публикации : CLEO-SI: Optical Society of America, 2015. - P.2267. - ISBN 9781557529688 (ISBN), DOI 10.1364/CLEO_SI.2015.STh3H.2. - ISBN 2160-9020
Примечания : Cited References:6
Предметные рубрики: CRYSTAL
NM
Аннотация: Tunable coherent radiation is generated in the VUV down to 121 nm using random quasi-phase-matching in strontium tetraborate, the shortest wavelength ever produced with a second-order nonlinear optical process in a solid-state material. © 2015 Optical Society of America.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Аплеснин, Сергей Степанович, Udod L. V., Sitnikov M. N., Eremin E. V., Molokeev M. S., Tarasova L. S., Yanushkevich K. I., Galyas A. I.
Заглавие : Correlation of the magnetic and transport properties with polymorphic transitions in bismuth pyrostannate Bi2(Sn1 − xCr x)2O7
Коллективы : Russian Foundation for Basic Research [15-02-01445-a], Ministry of Education and Science of the Russian Federation [114090470016]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 8. - P.1627-1632. - ISSN 1063-7834, DOI 10.1134/S1063783415080028
Примечания : Cited References: 17. - This study was supported by the Russian Foundation for Basic Research (project no. 15-02-01445-a) and the Ministry of Education and Science of the Russian Federation (state task no. 114090470016).
Предметные рубрики: GAS SENSORS
Bi2Sn2O7
CRYSTAL
Аннотация: The correlation of the electrical, magnetic, and structural properties of Bi2(Sn1 − xCrx)2O7 solid solutions has been investigated for two compositions with x = 0.05 and 0.1. The temperatures of structural phase transitions and anomalies of the electrical resistance in the vicinity of these transitions at temperatures in the range 300 K ˂ T ˂ 1000 K have been determined using differential scanning calorimetry. It has been found that the thermoelectric power changes sign upon the polymorphic transition. The paramagnetic Curie temperature and the chromium-ion spin have been found from the temperature dependence of the magnetic susceptibility in the range 4 K ˂ T ˂ 1000 K and from the field dependence of the magnetic moment in magnetic fields of up to 6 T.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanova O. S., Ivantsov R. D., Edelman I. S., Petrakovskaja E. A., Velikanov D. A., Zubavichus Y. V., Zaikovskii V .I., Stepanov S. A.
Заглавие : Identification of ε-Fe2O3 nano-phase in borate glasses doped with Fe and Gd
Место публикации : J. Magn. Magn. Mater.: Elsevier, 2016. - Vol. 401. - P.880-889. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2015.10.126
Примечания : Cited References: 40. - This work was supported partly by the Russian Foundation for Basic Research, Grants No 14-02-01211-a and by the President of Russia Grant No. NSh-2886.2014.2. Authors are grateful to G.A. Bukhtiyarova and U.N. Martyanov for the assistance in the ε-Fe2O3 nanoparticles prepared by a wet chemical pore filling impregnation method and for the discussion of the obtained results
Предметные рубрики: MAGNETIC-PROPERTIES
IRON-OXIDE
NANOPARTICLES
CERAMICS
CRYSTAL
PARTICLES
SURFACE
Ключевые слова (''Своб.индексиров.''): magnetic nanoparticles--ε-fe2o3--magnetic circular dichroism--electron magnetic resonance
Аннотация: A new type of magnetic nanoparticles was revealed in borate glasses co-doped with low contents of iron and gadolinium. Structure and magnetic properties of the particles differ essentially from that of the α-Fe2O3, γ-Fe2O3, or Fe3O4 nanoparticles which were detected earlier in similar glass matrices. Transmission electron microscopy including STEM-HAADF and EDX, synchrotron radiation-based XRD, static magnetic measurements, magnetic circular dichroism, and electron magnetic resonance studies allow referring the nanoparticles to the iron oxide phase-ε-Fe2O3. Analysis of the data set has shown that it is Gd atoms that govern the process of nanoparticles' nucleation and its incorporation into the particles in different proportions can be used to adjust their magnetic and magneto-optical characteristics. © 2015 Elsevier B.V.
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S.
Заглавие : Nonlinear optical processes and DUV generation in random domain structures of SBO
Коллективы : Conference on Lasers and Electro-Optics
Место публикации : Conference on Lasers and Electro-Optics Europe - Technical Digest/ Conference on Lasers and Electro-Optics (2015 ; may ; 10–15 ; San Jose, California, US): IEEE-Institute Electrical and Electronics Engineers, 2015. - Vol. 2015-August. - Ст.7184028. - ISBN 9781557529688 (ISBN), DOI 10.1364/CLEO_SI.2015.STh3H.1
Примечания : Cited References: 3
Предметные рубрики: CRYSTAL
Ключевые слова (''Своб.индексиров.''): correlation--nonlinear optics--optical diffraction--optical frequency conversion--optical harmonic generation--ultrafast optics
Аннотация: Random domain structures in orthorhombic strontium tetraborate (α-SBO) are capable in enhancing nonlinear optical conversion efficiency for large variety of processes throughout all transparency window of this material, down to 121 nm. Properties of the material, origin of domains, frequency doubling and autocorrelation measurements, conversion of supercontinuum to UV and continuously tunable VUV generation are described. Prospects of biphoton field generation in α-SBO are discussed. © 2015 OSA.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Romanova O. B., Galyas A. I., Sokolov V. V.
Заглавие : Study of electrical and thermoelecrical properties of sulfides TmxMn1-xS
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 58, Is. 1. - P.19-24. - ISSN 10637834 (ISSN), DOI 10.1134/S1063783416010029
Примечания : Cited References: 25. - This study was supported by the Russian Foundation for Basic Research (project no. 15-42-04099 r_si-bir_a) and State Contract no. 114090470016.
Предметные рубрики: SmxMn1-xS solid-solutions
MnS
Gd
Transition
Transport
Crystal
Аннотация: Variable-valence TmxMn1–xS (0 ⩽ x ⩽ 0.15) compounds have been synthesized and their structural, electrical, and thermoelectrical properties have been studied in the temperature range of 80–1100 K. The regions of existence of solid solutions of sulfides TmxMn1–xS with the NaCl-type fcc lattice have been determined. It has been found that, as thulium ions are substituted for manganese cations, the electrical resistivity increases, and the lattice parameter increases more sharply than that corresponding to the Vegard’s law. The study of the temperature dependences of the thermopower coefficient has revealed that the current carrier sign is retained to 500 K for all the substitution concentrations, and the charge carrier type changes from the hole type to the electron type with variations in the temperature. The experimental data have been explained in terms of the exciton model.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Trabs, Peter, Noack, Frank, Aleksandrovsky A. S., Zaitsev A. I., Petrov, Valentin
Заглавие : Generation of coherent radiation in the vacuum ultraviolet using randomly quasi-phase-matched strontium tetraborate
Место публикации : Opt. Lett.: Optical Society of America, 2016. - Vol. 41, Is. 3. - P.618-621. - ISSN 0146-9592, DOI 10.1364/OL.41.000618. - ISSN 1539-4794(eISSN)
Примечания : Cited References:15
Предметные рубрики: Crystal
SrB4O7
nm
Аннотация: Tunable coherent radiation is generated in the vacuum ultraviolet down to 121 nm using random quasi-phase matching in strontium tetraborate, the shortest wavelength ever produced with a second-order nonlinear optical process in a solid-state material. Relevant properties of this radiation, the nonlinear process, and the nonlinear crystal are investigated.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S.
Заглавие : Nonlinear optical processes and DUV generation in random domain structures of SBO
Коллективы : Conference on Lasers and Electro-Optics
Место публикации : Conference on Lasers and Electro-Optics Europe - Technical Digest/ Conference on Lasers and Electro-Optics (2015 ; May ; 10-15 ; San Jose, California, US): IEEE, 2015. - ISBN 2160-9020
Примечания : Cited References:3
Предметные рубрики: CRYSTAL
Аннотация: Random domain structures in orthorhombic strontium tetraborate (alpha-SBO) are capable in enhancing nonlinear optical conversion efficiency for large variety of processes throughout all transparency window of this material, down to 121 nm. Properties of the material, origin of domains, frequency doubling and autocorrelation measurements, conversion of supercontinuum to UV and continuously tunable VUV generation are described. Prospects of biphoton field generation in alpha-SBO are discussed.
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Trabs, Peter, Noack, Frank, Aleksandrovsky A. S., Zaitsev A. I., Petrov, Valentin
Заглавие : Generation of coherent vacuum UV radiation in randomly quasi-phase-matched strontium tetraborate
Место публикации : Conference on Lasers and electro-optics (CLEO): IEEE, 2015. - ISBN 2160-9020
Примечания : Cited References:6
Предметные рубрики: CRYSTAL
NM
Аннотация: Tunable coherent radiation is generated in the VUV down to 121 nm using random quasi-phase-matching in strontium tetraborate, the shortest wavelength ever produced with a second-order nonlinear optical process in a solid-state material. (C) 2015 Optical Society of America
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lim C. S., Atuchin V. V., Aleksandrovsky A. S., Molokeev M. S.
Заглавие : Preparation of NaSrLa(WO4)3:Ho3+/Yb3+ ternary tungstates and their upconversion photoluminescence properties
Место публикации : Mater. Lett.: Elsevier, 2016. - Vol. 181. - P.38-41. - ISSN 0167577X (ISSN), DOI 10.1016/j.matlet.2016.05.121
Примечания : Cited References: 24. - This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2015-058813), SB RAS Program No.II.2P (No. 0358-2015-0012) and Russian Foundation for Basic Research (15-52-53080).
Предметные рубрики: VIBRATIONAL PROPERTIES
LUMINESCENCE PROPERTIES
MODULATED STRUCTURE
PHOSPHORS
CRYSTAL
RED
Ключевые слова (''Своб.индексиров.''): tungstate--phosphor--sol-gel preparation--luminescence--raman spectroscopy--xrd
Аннотация: NaSrLa1-x(WO4)3:Ho3+/Yb3+ ternary tungstates were synthesized via microwave sol-gel route. Well-crystallized particles with particle sizes of 2-5 ?m were obtained after heat-treatment at 900 °C for 16 h. Under the excitation at 980 nm, the particles showed yellow emissions based on the strong 545 and 655 nm emission bands. The preferable Yb3+:Ho3+ ratio was obtained to be 9:1. Raman spectra of the doped particles indicated the presence of strong Ho3+ luminescence lines. The pump power dependence and Commission Internationale de L'Eclairage chromaticity of the upconversion emission intensity were evaluated. © 2016 Published by Elsevier B.V.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuz'menko A. M., Mukhin A. A., Ivanov V. Y., Kadomtseva A. M., Lebedev S. P., Bezmaternykh L. N.
Заглавие : Antiferromagnetic Resonance and Dielectric Properties of Rare-earth Ferroborates in the Submillimeter Frequency Range
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 113, Is. 1. - P113-120. - ISSN 1063-7761, DOI 10.1134/S106377611105013X
Примечания : Cited References: 27. - This work was supported by the Russian Foundation for Basic Research, project no. 10-02-00846.
Предметные рубрики: GDFE3(BO3)(4)
SPECTROSCOPY
CRYSTAL
Ключевые слова (''Своб.индексиров.''): antiferromagnetic resonance--basic parameters--effective anisotropy constant--ferroborates--ferroics--ferromagnetic orderings--frequency ranges--magnetic interactions--magnetoresonance--millimeter frequency range--rare earth ions--submillimeters--antiferromagnetic materials--crystallography--erbium--europium--ferromagnetic resonance--ion exchange--magnetic anisotropy--magnetic devices--magnetic structure--permittivity--resonance--antiferromagnetism
Аннотация: The magnetoresonance and dielectric properties of a number of crystals of a new family of multiferroics, namely, rare-earth ferroborates RFe(3)(BO(3))(4) (R = Y, Eu, Pr, Tb, Tb(0.25)Er(0.75)), are studied in the submillimeter frequency range (nu = 3-20 cm(-1)). Ferroborates with R = Y, Tb, and Eu exhibit permittivity jumps at temperatures of 375, 198, and 58 K, respectively, which are caused by the R32 - P3(1)2(1) phase transition. Antiferromagnetic resonance (AFMR) modes in the subsystem of Fe(3+) ions are detected in the range of antiferromagnetic ordering (T T(N)
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I., Ikonnikov A. A., Pospelov G. I.
Заглавие : Ultrashort pulses characterization by nonlinear diffraction from virtual beam
Место публикации : Appl. Phys. Lett.: AMER INST PHYSICS, 2011. - Vol. 98, Is. 6. - Ст.61104. - ISSN 0003-6951, DOI 10.1063/1.3554370
Примечания : Cited References: 14. - The work was supported by Ministry of Education and Science of Russian Federation (Contract No. 16.740.11.0150); Grant of President of Russian Federation for support of leading scientific schools Grant No. SS-4645.2010.2; Grant No. RNP.2.1.1.3455 and Projects 2.5.2 and 3.9.1 of PSB RAS; and Projects Nos. 27.1 and 5 of SB RAS. A. M. Vyunishev is grateful for support from Carl Zeiss Grant and from Krasnoyarsk Regional Fund of Science and Technical Activity Support.
Предметные рубрики: CRYSTAL
SRB4O7
Ключевые слова (''Своб.индексиров.''): broad spectral--frequency-doubling--noncollinear--nonlinear diffraction--nonlinear photonic crystals--short-wavelength--tetraborate--ultrafast diagnostics--diffraction--light propagation--strontium--ultrashort pulses--photonic crystals
Аннотация: Noncollinear frequency doubling in a random nonlinear photonic crystal of strontium tetraborate via nonlinear diffraction from virtual beam is investigated. This effect is shown to be useful for ultrashort pulses characterization in broad spectral range. Nonlinear photonic crystals of strontium tetraborate are a promising medium for ultrafast diagnostics in short-wavelength applications. (C) 2011 American Institute of Physics. [doi:10.1063/1.3554370]
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