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    Spectroscopic properties of ErAl3(BO3)4 single crystal / A. V. Malakhovskii [et al.] // Chem. Phys. - 2014. - Vol. 428. - P. 137–143, DOI 10.1016/j.chemphys.2013.11.008. - Cited References: 43. - The work was supported by the Russian Foundation for Basic Researches grant 12-02-00026, by the Russian President Grants SS-1044.2012.2 and 4828.2012.2, by project No 3.9.5 PSB RAS, and by the Ministry of Education and Science of Russian Federation grant 8365 . - ISSN 0301-0104. - ISSN 1873-4421
   Перевод заглавия: Спектроскопические свойства монокристалла ErAl3(BO3)4

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
RARE-EARTH IONS
   GREEN UP-CONVERSION
   ER3+ IONS
   MICROCHIP LASER
   ABSORPTION INTENSITIES
   YAL3(BO3)4 CRYSTAL
   OPTICAL-ABSORPTION
   FIELD ANALYSIS
   GROWTH
   LUMINESCENCE
Кл.слова (ненормированные):
Rare earth compounds -- Er3+ -- Spectroscopic properties -- Judd-Ofelt analysis -- Luminescence
Аннотация: Single crystal of ErAl3(BO3)4 was grown and its structure was studied. Polarized absorption spectra of ErAl3(BO3)4 single crystal were measured in the spectral range 1670–330 nm (6000–30000 cm−1). The Judd–Ofelt spectroscopic parameters have been determined: Ω2 = 4.87 × 10−20 cm2, Ω4 = 2.49 × 10−20 cm2, Ω6 = 2.72 × 10−20 cm2. These parameters have been used to calculate the radiative transition probabilities, the multiplet luminescence branching ratios and the fluorescence life times of the manifolds. The luminescence spectra due to transitions 2H11/2 → 4I15/2 (526 nm), 4S3/2 → 4I15/2 (548 nm), 4F9/2 → 4I15/2 (662 nm), 2H11/2 → 4I13/2 + 4I9/2 → 4I15/2 (800 nm) and 4S3/2 → 4I13/2 (855 nm) were recorded in α, σ and π polarizations. The most intensive luminescence belonged to 4S3/2 → 4I15/2 transition (548 nm).
Поляризованные спектры поглощения ErAl3 (BO3) 4 монокристалла были измерены в спектральном диапазоне 1670-330 нм (6000-30000 см-1). Спектроскопические параметры Джадда-Офельта были определены как: Ω2 = 4,87 • 10-20 см2, Ω4 = 2.49 • 10-20 см2, Ω6 = 2,72 • 10-20 см2. Параметры были использованы для расчета вероятностей излучающих переходов, мультиплетные отношения люминесценции раскола и времена жизни мультиплетов. Спектры люминесценции за счет переходов 2П11 / 2 → 4I15 / 2 (526 нм), 4S3 / 2 → 4I15 / 2 (548 нм), 4F9 / 2 → 4I15 / 2 (662 нм), 2П11 / 2 → 4I13 / 2 + 4I9 / 2 → 4I15 / 2 (800 нм) и 4S3 / 2 → 4I13 / 2 (855 нм) были записаны в α, σ и π поляризации. Наиболее интенсивное свечение принадлежало переходу 4S3 / 2 → 4I15 / 2 (548 нм).

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Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Kutsak, T. V.; Куцак, Т. В.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Gudim, Irina A.; Гудим, Ирина Анатольевна; Molokeev, M. S.; Молокеев, Максим Сергеевич
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Giant natural circular dichroism of vibronic transitions in HoAl3(BO3)4 / A. V. Malakhovskii [et al.] // JETP Letters. - 2015. - Vol. 102, Is. 8. - P. 493-495, DOI 10.1134/S0021364015200084. - Cited References: 15. - This work was supported by the Council of the President of the Russian Federation for the Support of Leading Scientific Schools (project no. NSh-2886.2014.2). . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
SINGLE-CRYSTAL
   OPTICAL-ABSORPTION
   SPECTRA
   Ho3+
   IONS
   PR3+
Аннотация: The giant natural optical activity of vibronic replicas of the f–f5/8 → 5F2 transition in HoAl3(BO3)4 is observed. It exceeds the optical activity related to purely electronic transitions by two orders of magnitude and corresponds to the almost complete circular polarization of the transitions. This effect is explained by the local distortions of the crystal in the excited electronic state, which lead to the mixing of electron and vibrational wavefunctions and, as a consequence, to the delocalization of the vibronic wavefunction and the enhancement of spatial dispersion, which is responsible for the optical activity.

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Публикация на русском языке Гигантский естественный круговой дихроизм вибронных переходов в HoAl3(BO3)4 [Текст] / А. В. Малаховский [и др.] // Письма в ЖЭТФ : Наука, 2015. - Т. 102 Вып. 8. - С. 555-557

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Sokolov, V. V.; Gudim, I. A.; Гудим, Ирина Анатольевна
}
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Electronic transitions and genuine crystal-field parameters in copper metaborate CuB2O4 / R. V. Pisarev [et al.] // Phys. Rev. B. - 2011. - Vol. 84, Is. 7. - Ст. 75160, DOI 10.1103/PhysRevB.84.075160. - Cited References: 65. - Useful discussions with W. Weber on crystal-field splitting of 3d states in cuprates are appreciated. We thank H.-J. Weber for the help in using Cary 2300 spectrophotometer. This work is supported by the Russian Foundation for Basic Research (project No. 09-02-00070) and Federal Agency for Science and Innovations (Grant No. 02.740.11.0384). A. M. K. acknowledges the financial support from the Committee for Science and Higher Education of the Government of Saint Petersburg. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
OPTICAL-ABSORPTION
   PHASE-DIAGRAM
   CUGEO3
   SPECTRUM
   SUPERCONDUCTORS
   EXCITATIONS
   SR2CUO2CL2
   SCATTERING
   LA2CUO4
   CUPRATE
Аннотация: We present and analyze high-resolution alpha-, sigma-, and pi-polarized absorption spectra related to d-d electronic transitions in tetragonal metaborate CuB2O4 where copper Cu2+ ions occupy two crystallographically distinct 4b and 8d positions. The spectra are characterized by exceptionally rich fine structure in the spectral range of 1.4-2.4 eV. Six zero-phonon (ZP) lines originating from the electronic transitions within the Cu2+ ions in both positions are distinguished and identified. Symmetry analysis explains polarization properties of the ZP lines in the 8d positions but only partially explains them in the 4b positions. Reliable assignment of all six ZP lines to specific transitions allowed us to calculate genuine cubic Dq and tetragonal Ds and Dt crystal-field parameters for both positions. We show that the (3r(2) - z(2)) state, the energy of which is the measure of the Jahn-Teller splitting, is the highest 3d state for both types of Cu2+ ion positions. Using the obtained crystal-field parameters as the reference values, we estimated Dq, Ds, and Dt for several other cuprates with different Cu-O bond lengths. In particular, the 3d level splitting in La2CuO4, Nd2CuO4, CuGeO3, Sr2CuO2Cl2, and Cu3B7O13Cl was analyzed. Our estimates suggest that the Jahn-Teller splitting in some of these cuprates is larger than it was assumed previously.

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Держатели документа:
[Pisarev, R. V.
Kalashnikova, A. M.] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
[Schoeps, O.] Dortmund Tech Univ, Inst Phys, D-44221 Dortmund, Germany
[Bezmaternykh, L. N.] Russian Acad Sci, Siberian Branch, Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russian Federation
Institute of Physics, Dortmund Technical University, 44221 Dortmund, Germany
Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Pisarev, R. V.; Kalashnikova, A. M.; Schops, O.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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Polarized absorption spectra and spectroscopic parameters of Tm3+ in the TmAl3(BO3)(4) single crystal / A. V. Malakhovskii [et al.] // Phys. Solid State. - 2008. - Vol. 50, Is. 7. - P. 1287-1293, DOI 10.1134/S1063783408070159. - Cited References: 36 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
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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Держатели документа:
[Malakhovskii, A. V.
Sokolov, A. E.
Temerov, V. L.
Bezmaternykh, L. N.
Sukhachev, A. L.
Seredkin, V. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Gnatchenko, S. L.
Kachur, I. S.
Piryatinskaya, V. G.] Natl Acad Sci Ukraine, Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, pr. Lenina 47, Kharkov 61103, Ukraine

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sokolov, A. E.; Соколов, Алексей Эдуардович; Temerov, V. L.; Темеров, Владислав Леонидович; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Sukhachev, A. L.; Сухачев, Александр Леонидович; Seredkin, V. A.; Середкин, Виталий Александрович; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.
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Popov, E. A.
Absorption of light by exchange-coupled ions in a 2D antiferromagnet / E. A. Popov, B. V. Beznosikov // Phys. Solid State. - 2003. - Vol. 45, Is. 8. - P. 1475-1478, DOI 10.1134/1.1602882. - Cited References: 9 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
OPTICAL-ABSORPTION
RB2MNCL4
Аннотация: The optical absorption spectra of Rb2MnxCd1-xCl4 crystals are experimentally studied in the vicinity of a magnon sideband of the exciton band at a manganese content x ranging from 1.0 to 0.4. Additional absorption bands are observed with an increase in the magnetic structural disorder upon replacement of manganese ions by cadmium ions. An analysis of the evolution of the additional absorption bands in a magnetic field during the spin-flop phase transition and the change in the intensity with variations in the manganese content x demonstrates that these bands are associated with the excitation of the exchange-coupled pairs of manganese ions located in different environments in a plane square lattice. The phase boundary between the antiferromagnetic and spin-flop phases is constructed using the results of optical measurements. The manganese content corresponding to the magnetic percolation point is evaluated. (C) 2003 MAIK "Nauka/Interperiodica".

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Держатели документа:
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Sierian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Beznosikov, B. V.; Безносиков, Борис Валерьевич
}
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