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Spectroscopic properties of Nd0.5Gd0.5Fe3(BO3)4 single crystal / A. V. Malakhovskii [et al.] // J. Alloys Compd. - 2012. - Vol. 529. - P. 38-43, DOI 10.1016/j.jallcom.2012.03.066. - Cited References: 51. - 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 SS-4828.2012.2, by Ministry of Education and Science of Russian Federation (Contract 16.740.11.0150), by grant no. SFU.F12 and by Projects No. 28, 43 and No. 101 of SB RAS. . - ISSN 0925-8388

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
SPECTRAL-LINE INTENSITIES
   RARE-EARTH IONS
   MAGNETIC-PROPERTIES
   NDAL3(BO3)(4) NAB
   OPTICAL-SPECTRA
   LASER CRYSTAL
   TRANSITIONS
   ABSORPTION
   ND3+
   PR3+
Кл.слова (ненормированные):
Magnetically ordered materials -- Rare earth alloys and compounds -- Transition metal alloys and compounds -- Optical properties
Аннотация: The polarized absorption spectra of trigonal single crystal Nd0.5Gd0.5Fe3(BO3)4 were measured in the spectral range 10,000–22,000 cm−1. The d–d and f–f transitions spectra were separated. The f–f transitions intensities were analyzed in terms of the Judd–Ofelt theory in a ferroborate with huntite structure for the first time, and the following parameters of the theory were obtained: Ω2 = 4.4 × 10−20 cm2, Ω4 = 8.04 × 10−20 cm2, and Ω6 = 8.25 × 10−20 cm2. The strengths, spontaneous emission probabilities, branching ratios, spectroscopic quality factor and excited state lifetime were calculated for transitions from the 4F3/2 state to 4IJ manifold. All the obtained spectroscopic characteristics were compared with those of alumoborates with the same crystal structure.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Leont'ev, A. A.; Леонтьев, Андрей Александрович; Gudim, I. A.; Гудим, Ирина Анатольевна; Krylov, A. S.; Крылов, Александр Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр 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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Magnetic and natural optical activity of f–f transitions in multiferroic Nd0.5Gd0.5Fe3(BO3)4 / A. V. Malakhovskii [et al.] // Phys. Solid State. - 2016. - Vol. 58, Is. 5. - P. 952-958, DOI 10.1134/S1063783416050152. - Cited References:29. - This study was supported by the Council on Grants from the President of the Russian Federation for the State Support of Leading Scientific Schools (grant no. NSh-2886.2014.2) and the Russian Foundation for Basic Research (project no. 16-02-00273). . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
Circular-dichroism spectra
   Magnetooptical properties
   Single-crystal
   Absorption
   Ions
   NdFe3(BO3)4
   Nd3+
   Pr3+
   Ho3+
Аннотация: Spectra of absorption, magnetic circular dichroism, and natural circular dichroism of the f–f transitions 4I9/2 → 4F3/2, 2H9/2 + 4F5/2, 4S3/2 + 4F7/2, 2G7/2 + 4G5/2, 2K13/2 + 4G7/2, and 4G9/2 in the Nd3+ ions in the Nd0.5Gd0.5Fe3(BO3)4 crystal have been measured as a function of the temperature in the interval of 90–300 K. Temperature dependences of the magneto-optical activity (MOA) and natural optical activity (NOA) of the transitions have been obtained. It has been found that, in contrast to allowed transitions, the temperature dependence of the MOA of the f–f transitions does not obey the Curie–Weiss law and the NOA depends on temperature. The NOA of some transitions changes the sign with variation in temperature. These phenomena have been explained by the presence of three contributions to the allowance of the f–f transitions, which lead to three contributions of different signs to the MOA and NOA. The range of the MOA of the f–f transitions in the Nd3+ ion has been predicted theoretically and confirmed experimentally.

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Публикация на русском языке Магнитная и естественная оптическая активность f-f- переходов в мультиферроике Nd0.5Gd0.5Fe3(BO3)4 [Текст] / А. В. Малаховский [и др.] // Физ. тверд. тела. - 2016. - Т. 58 Вып. 5. - С. 923–928

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Leont'ev, A. A.; Леонтьев, Андрей Александрович; Temerov, V. L.; Темеров, Владислав Леонидович; Council on Grants from the President of the Russian Federation for the State Support of Leading Scientific Schools [NSh-2886.2014.2]; Russian Foundation for Basic Research [16-02-00273]
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Magneto-optical properties of Dy3+ in oxide glasses: The origin of the magneto-optical activity of f-f transitions and its anomalous temperature dependence / A. V. Malakhovskii [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 4. - P. 701-707, DOI 10.1134/S1063783407040178. - Cited References: 28 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC CIRCULAR-DICHROISM
   FLUOROZIRCONATE ZBLAN GLASS
   OPTICAL-ABSORPTION SPECTRA
   DOPED SODA GLASS
   SPECTROSCOPIC PROPERTIES
   FLUOROBORATE GLASSES
   LITHIUM BORATE
   IONS
   PR3+
   GADOLINIUM
Аннотация: The temperature dependence of the absorption spectra and magnetic circular dichroism due to f-f transitions from the H-6(15/2) to F-6 (5/2) and (6)(F (7/2) + H (5/2)) states in the Dy3+ ion in (Dy2O3-P2O5-SiO2-GeO2) and (Dy2O3-La2O3-Al2O3-B2O3-SiO2-GeO2) glasses and the temperature dependence of the Faraday effect were studied. The temperature dependence of the Faraday effect caused by f-d transitions was found to differ from that of the magnetic circular dichroism due to f-f transitions. It was shown that f-f transitions occur preferentially in Dy3+ ions associated into clusters. The origin of the paramagnetic magneto-optical activity of f-f transitions was analyzed. It was shown that the contributions to this activity can differ in value and sign and that the ratio between these contributions depends on the transition type. In some cases, this difference results in an anomalous temperature dependence of the magneto-optical activity.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
SI Vavilov State Opt Inst, St Petersburg 192371, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, 660041, Russian Federation
Vavilov State Optical Institute, Birzhevaya liniya 12, St. Petersburg, 192371, Russian Federation

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Isachenko, V. A.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Potseluyko, A. M.; Zabluda, V. N.; Заблуда, Владимир Николаевич; Zarubina, T. V.; Edelman, I. S.; Эдельман, Ирина Самсоновна
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