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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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    Effect of Gd and Sr ordering in a sites of doped Gd0.2Sr0.8CoO3-δ perovskite on its structural, magnetic, and thermodynamic properties / V. A. Dudnikov [et al.] // J. Phys. Chem. C. - 2016. - Vol. 120, Is. 25. - P,. 13443-13449, DOI 10.1021/acs.jpcc.6b04810. - Cited References: 45. - The authors are thankful to the Russian Science Foundation (Project No. 16-13-00060) for financial support. The magnetic measurements were carried out in the Shared Facility Centre of P. N. Lebedev Physical Institute of RAS. . - ISSN 1932-7447
Рубрики:
Ln1-xSrxCoO(3-δ) Ln
   PROFILE REFINEMENT
   CRYSTAL-STRUCTURE
   OXYGEN-CONTENT
   COBALTITES
   OXIDE
   La1-xSrxCoO3-δ
   Dy3+
   SPIN
   Ho3+
Аннотация: Magnetic and thermodynamic properties of perovskite Gd0.2Sr0.8CoO3−δ, with ordered and disordered states of Gd and Sr in the A-sites of the crystal lattice have been studied revealing remarkable differences in the physical properties of the ordered and disordered states. The ordered samples have larger oxygen nonstoichiometry, heat capacity, and thermal expansion anomalies, and abnormal temperature dependence of the magnetization around 350 K.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Lebedev Physical Institute, Moscow, Russian Federation
Institute of Chemistry and Chemical Technology, Krasnoyarsk, Russian Federation
Faculty of Physics, Lomonosov Moscow State University, Moscow, Russian Federation

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Gavrilkin, S. Yu.; Gorev, M. V.; Горев, Михаил Васильевич; Vereshchagin, S. N.; Solovyov, L. A.; Соловьев, Леонид Александрович; Perov, N. S.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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