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Terahertz spectroscopy of multiferroic EuFe3(BO3)4 / K. N. Boldyrev [et al.] // Phys. Lett. A. - 2012. - Vol. 376, Is. 37. - P. 2562-2564, DOI 10.1016/j.physleta.2012.06.028. - Cited References: 19. - This work was partially supported by the Russian Foundation for Basic Research under Grants No. 10-02-01071-a and No. 09-02-00171-a, by the Ministry of Education and Science under Grant HIII-4828.2012.2, and by the Russian Academy of Sciences under the programs for basic research. . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
SINGLE-CRYSTAL
GDFE3(BO3)4
Кл.слова (ненормированные):
Terahertz spectroscopy -- Multiferroics -- Europium iron borate
Аннотация: The terahertz spectra of a rare-earth iron borate with the huntite structure are obtained for the first time. We study the low-temperature (4.0–90 K) α-polarized transmittance spectra of the EuFe3(BO3)4 single crystal in the region 0.9–6.0 THz. Pronounced shifts of phonon frequencies and appearance of new phonon modes at the temperature T S = 58 K of the R 32 → P 3 1 21 structural phase transition are observed. Additional shifts of phonon frequencies occur at the temperature T N = 34 K of the magnetic ordering of the Fe subsystem, thus evidencing the spin–phonon coupling in this multiferroic material.

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Держатели документа:
[Boldyrev, K. N.
Klimin, S. A.
Popova, M. N.] RAS, Inst Spect, Troitsk 142190, Moscow Region, Russia
[Stanislavchuk, T. N.] New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA
[Bezmaternykh, L. N.] RAS, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Boldyrev, K. N.; Stanislavchuk, T. N.; Klimin, S. A.; Popova, M. N.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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    Synthesis and spectroscopic properties of monoclinic α-Eu2(MoO4)3 / V. V. Atuchin [et al.] // J. Phys. Chem. C. - 2014. - Vol. 118, Is. 28. - P. 15404-15411, DOI 10.1021/jp5040739. - Cited References: 63. - This study is partly supported by the Ministry of Education and Science of the Russian Federation. . - ISSN 1932-7447
   Перевод заглавия: Синтез и спектроскопические свойства моноклинного а-Eu2(MoO4)3

РУБ Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
RARE-EARTH MOLYBDATES
   VIBRATIONAL PROPERTIES
   LUMINESCENCE PROPERTIES
   CRYSTAL-STRUCTURE
   PHASE-TRANSITIONS
   TRIPLE MOLYBDATE
   SINGLE-CRYSTAL
   X-RAY
   PHOSPHORS
   EUROPIUM
Аннотация: The microcrystals of monoclinic europium molybdate, alpha-Eu-2(MoO4)(3), have been fabricated by solid-state synthesis at T = 753-1273 K for 300 h. The crystal structure of alpha-Eu-2(MoO4)(3) has been refined by the Rietveld method and was found to belong to the space group C2/c with unit cell parameters a = 7.5576(1), b = 11.4709(2), c = 11.5158(2) angstrom, and beta = 109.278(1)degrees (R-B = 3.39%). About 40 narrow Raman lines have been observed in the Raman spectrum of the alpha-Eu-2(MoO4)(3) powder sample. The luminescence spectra of alpha-Eu-2(MoO4)(3) under excitation at 355 and 457.9 nm reveal domination of induced electric dipole transition D-5(0) - F-7(2) and the presence of ultranarrow lines at D-5(0) - F-7(0) and D-5(1) - F-7(0) transitions.

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Держатели документа:
SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk 630090, Russia
SB RAS, Lab Coherent Opt, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
SB RAS, Lab Oxide Syst, Baikal Inst Nat Management, Ulan Ude 670047, Russia
SB RAS, Inst Semicond Phys, Lab Nanodiagnost & Nanolithog, Novosibirsk 630090, Russia
SB RAS, Kirensky Inst Phys, Lab Mol Spect, Krasnoyarsk 660036, Russia
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Atuchin, V. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Chimitova, O. D.; Gavrilova, T. A.; Krylov, A. S.; Крылов, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Bazarov, B. G.; Bazarova, J. G.; Ministry of Education and Science of the Russian Federation
}
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    Growth, optical and microstructural properties of PbB4O7 plate crystals / A. I. Zaitsev [et al.] // Opt. Mater. - 2014. - Vol. 37. - P. 298–301, DOI 10.1016/j.optmat.2014.06.012. - Cited References: 42. - This study is supported by SB RAS via Projects 28.14 and 43.14, and the Grant of the President of the Russian Federation for the support of leading scientific schools SS-4828.2012.2 and by PSB RAS, Grant 2.5.2. V.V.A. gratefully acknowledge the Ministry of Education and Science of the Russian Federation for financial support . - ISSN 0925-3467. - ISSN 1873-1252
   Перевод заглавия: Рост, оптические и микроструктурные свойства пластинчатых кристаллов PbB4O7

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
LEAD TETRABORATE
   SINGLE-CRYSTAL
   SUSCEPTIBILITIES
   ANISOTROPY
   STRONTIUM
   SURFACES
   RAMAN
Кл.слова (ненормированные):
PbB4O7 -- Czochralski growth -- Facet -- RHEED -- AFM
Аннотация: Centimeter-sized optical quality plate-like PbB4O7 crystals have been grown by Czochralski method. The fundamental absorption edge has been found at 237 nm (corresponding bandgap 5.75 eV) with the distinct sideband protruding up to 300 nm. The crystals are well faceted with the (100), (010) and (101) planes, (100) surfaces being mostly developed. The etching in diluted nitric acid (5 wt.%) at the temperature of 90 °C have been used to reveal the defect structure and remove melt residuals. The (100) surface shows the presence of etching pits and twin boundaries. The Kikuchi line pattern and developed microrelief with the roughness of ~8 nm have been observed by RHEED and AFM, respectively.

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Держатели документа:
SB RAS, Akademgorodok, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 690036, Russia
Akademgorodok, SB RAS, Kirensky Inst Phys, Lab Coherent Opt, Krasnoyarsk 690036, Russia
Russian Acad Sci, Inst Semicond Phys, Lab Nanodiagnost & Nanolithog, SB RAS, Novosibirsk 630090, Russia
Russian Acad Sci, Inst Semicond Phys, Lab Opt Mat & Struct, SB RAS, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Novosibirsk State Univ, Novosibirsk 630090, Russia

Доп.точки доступа:
Zaitsev, A. I.; Зайцев, Александр Иванович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Kozhukhov, A. S.; Pokrovsky, L. D.; Atuchin, V. V.; SB RAS [28.14, 43.14]; President of the Russian Federation for the support of leading scientific schools [SS-4828.2012.2]; PSB RAS [2.5.2]; Ministry of Education and Science of the Russian Federation
}
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    Local magnetic properties of multiferroic Nd0.5Gd0.5Fe3(BO3)4 in the excited states of Nd3+ ion / A. V. Malakhovskii [et al.] // J. Magn. Magn. Mater. - 2015. - Vol. 375. - P. 153-163, DOI 10.1016/j.jmmm.2014.09.077. - Cited References: 35. - The work was supported by the Russian Foundation for Basic Researches Grant 12-02-00026 and by the President of Russia grant No Nsh-2886.2014.2. . - ISSN 0304-8853
   Перевод заглавия: Локальные магнитные свойства мультифероика Nd0.5Gd0.5Fe3(BO3)4 в возбужденном состоянии иона Nd3+

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTAL
NdFe3(BO3)4
GdFe3(BO3)4
Кл.слова (ненормированные):
f-f transitions -- Nd3+ ion -- Excited states -- Local magnetic properties
Аннотация: Polarized absorption spectra of single-crystal Nd0.5Gd0.5Fe3(BO3)4 were studied in the region of the transition 4I9/2>(4G5/2+2G7/2) in Nd3+ ion as a function of temperature (2-34 K) and magnetic field (0-65 kOe). The spectra of natural circular dichroism were measured in the range of 5-40 K. It was found out that the local magnetic properties in the vicinity of the excited ion substantially depended on its state. In particular, a weak ferromagnetic moment appears in some excited states. It was found out that the selection rules for electron transitions in the magnetically ordered state substantially deviated from those in the paramagnetic state of the crystal. They are different for different transitions and they are very sensitive to the orientation of the sublattice magnetic moment relative to the light polarization. In the spectrum of the natural circular dichroism, the transition is revealed which is not observed in the absorption spectrum.
Поляризованные спектры поглощения монокристаллов Nd0.5Gd0.5Fe3 (BO3) 4 изучались в области переход 4 I9 / 2 (4G5 / 2þ27/2), в Nd3+ иона в зависимости от температуры (2-34 К) и магнитного поля (0-65 кЭ). Спектры природного кругового дихроизма были измерены в диапазоне 5-40 К. Было установлено, что локальные магнитные свойства в непосредственной близости от возбужденного иона существенно зависит от его состояния. В частности, в некоторых возбужденных состояниях появляется слабый ферромагнитный момент . Выяснилось, что правила отбора для электронных переходов в магнитоупорядоченных состоянии существенно отклонились от тех, которые в парамагнитного состояния кристалла. Они различны для разных переходов, и они очень чувствительны к ориентации подрешетки магнитного момента по отношению к поляризации света. В спектре естественного кругового дихроизма, проявляется переход , который не наблюдается в спектре поглощения.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Temerov, V. L.; Темеров, Владислав Леонидович; Russian Foundation for Basic Researches [12-02-00026]; President of Russia grant [Nsh-2886.2014.2]
}
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    Aleksandrov, K. S.
    Hierarchies of perovskite-like crystals (Review) / K. S. Aleksandrov, V. V. Beznosikov // Phys. Solid State. - 1997. - Vol. 39, Is. 5. - P. 695-715, DOI 10.1134/1.1130120. - Cited References: 143 . - ISSN 1063-7834
Рубрики:
CU-O SYSTEM
   HIGH-PRESSURE SYNTHESIS
   SUPERCONDUCTING COPPER OXIDES
   STRUCTURAL PHASE-TRANSITIONS
   NEUTRON POWDER DIFFRACTION
   SINGLE-CRYSTAL
   X-RAY
   CUPRATE SUPERCONDUCTORS
   DIELECTRIC-PROPERTIES
   HOMOLOGOUS SERIES
Аннотация: A system of mutual relationships (a hierarchy) is constructed between various perovskite-like crystal structures based on available structural data. All the perovskite-like structures are characterized by a common indicator of their relationship-the presence of layers, stacks, or frameworks made up of BX6 octahedra linked at their vertices (where B is a cation, X is an anion) or fragments of octahedra in the form of BX5 pyramids or BX4 squares in anion-deficient compounds. In layered structures, these stacks are joined to each other by various intermediate blocks. It is well known that one homological series of compounds is constructed by increasing the number of layers in a stack while preserving the same kind of connecting block. Crystals of various series that contain identical stacks (but different blocks of one or two types) can also be related to one another via this feature. The hierarchical system includes compounds with small distortions in their structures for various reasons. (C) 1997 American Institute of Physics.

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Публикация на русском языке Александров, Кирилл Сергеевич. Иерархия перовскитоподобных кристаллов (Обзор) [Текст] / К. С. Александров, Б. В. Безносиков // Физ. тверд. тела. - Санкт-Петербург, 1997. - Т. 39 Вып. 5. - С. 785-808

Доп.точки доступа:
Beznosikov, B. V.; Безносиков, Борис Валерьевич; Александров, Кирилл Сергеевич
}
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Solid-state synthesis, structural and magnetic properties of CoPd films / V. G. Myagkov [et al.] // Phys. Solid State. - 2015. - Vol. 57, Is. 5. - P. 1014-1022, DOI 10.1134/S1063783415050236. - Cited References:57. - This study was supported in part by the Russian Foundation for Basic Research (project no. 15-02-00948). . - ISSN 1063. - ISSN 1090-6460. -

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SYNTHESIS
   EPITAXIAL THIN-FILMS
   CENTERED-CUBIC CO
   MARTENSITIC TRANSFORMATIONS
   PHASE SYNTHESIS
   SINGLE-CRYSTAL
   FE FILMS
   CO/PD MULTILAYERS
   RECORDING MEDIA
   ANISOTROPY
Аннотация: The results of the investigation of the structural and magnetic properties of CoPd films with equiatomic composition have been presented. The films have been synthesized by vacuum annealing of polycrystalline Pd/Co and epitaxial Pd/α-Co(110) and Pd/β-Co(001) bilayer samples. It has been shown that, for all samples, the annealing to 400°C does not lead to the mixing of layers and the formation of compounds. A further increase in the annealing temperature results in the formation of a disordered CoPd phase at the Pd/Co interface, which is fully completed after annealing at 650°C. The epitaxial relationships between the disordered CoPd phase and the MgO(001) substrate are determined as follows: CoPd(110)〈1¯11|| MgO(001)〈100〉 and CoPd(001)[100] || MgO(001)[100], which are formed in the Pd/αCo(110) and Pd/βCo(001) films, respectively. According to the calculations, the first magnetocrystalline anisotropy constants of the disordered CoPd phase for Pd/αCo(110) and Pd/βCo(001) samples have close values: = –(1.6 ± 0.4) × 105 erg/cm3. A possible mechanism of the solidstate synthesis of the CoPd alloy is proposed.

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Публикация на русском языке Твердофазный синтез, структурные и магнитные свойства пленок CoPd [Текст] / В. Г. Мягков [и др.] // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2015. - Т. 57 Вып. 5. - С. 999-1006

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

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Bykova, L. E.; Быкова, Людмила Евгеньевна; Zhigalov, V. S.; Жигалов, Виктор Степанович; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Bondarenko, G. N.; Бондаренко, Галина Николаевна; Matsynin, A. A.; Мацынин, Алексей Александрович; Rybakova, A. N.; Russian Foundation for Basic Research [15-02-00948]
}
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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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    Changes of the local magnetic properties of the optically excited Nd3+ ions and their manifestation in the near IR spectra of the Nd0.5Gd0.5Fe3(BO3)4 crystal / A. V. Malakhovskii [et al.] // Opt. Mater. - 2016. - Vol. 52. - P. 126-133, DOI 10.1016/j.optmat.2015.12.029. - Cited References: 29. - The work was supported by the Russian Foundation for Basic Researches Grant 16-02-00273 and by the President of Russia Grant No. Nsh-2886.2014.2. . - ISSN 0925-3467. - ISSN 1873-1252
   Перевод заглавия: Изменения локальных магнитных свойств оптически возбужденных ионов Nd3+ и их проявление в ближних ИК-спектрах кристалла Nd0.5Gd0.5Fe3(BO3)4

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
SINGLE-CRYSTAL
GdFe3(BO3)4
STATES
Кл.слова (ненормированные):
f-f transitions -- Nd3+ ion -- Excited states -- Local magnetic properties
Аннотация: Polarized absorption spectra of f–f transitions 4I9/2 → 4F3/2 and (2H9/2 + 4F5/2) in the Nd3+ ion in the Nd0.5Gd0.5Fe3(BO3)4 single crystal were studied as a function of temperature in the range of 2–40 K and as a function of magnetic field in the range of 0–65 kOe at 2 K. It was found out that the selection rules for f–f electron transitions substantially changed in the magnetically ordered state of the crystal, and they strongly depended on the orientation of the Fe and Nd ions magnetic moments relative to the light polarization. The splitting of the ground and excited states of the Nd3+ ion in the exchange field of the Fe sublattice were determined. It was revealed that the value of the exchange splitting (the exchange interaction) in the excited states did not correlate with the theoretical Landé factors. The Landé factors of the excited states were experimentally found. In general, the local magnetic properties in the vicinity of the excited ion depend substantially on its electron state. In particular: (1) in one of the excited states a weak ferromagnetic moment appears, (2) the changes of type of the local magnetic anisotropy take place in some excited states, and (3) in some excited states the energetically favorable orientation of the Nd3+ ion magnetic moment is opposite to that in the ground state. In some excited states the nonequivalent Nd3+ centers were found out.
Поляризованные спектры поглощения F-е переходов 4I9/2 → 4F3/2 и (2H9/2 + 4F5/2) в иона Nd3+ в Nd0.5Gd0.5Fe3(BO3)4 монокристалл изучались как функции температуры в интервале 2-40 K и в зависимости от магнитного поля в диапазоне 0-65 кЭ при 2 К. Выяснилось, что Правила отбора для F-F электронных переходов существенно изменился в магнитно-упорядоченном состоянии кристалла, и они сильно зависели от ориентации магнитных моментов ионов Fe и Nd по отношению к поляризация света. Расщепление основного и возбужденного состояний иона Nd3+ в обменном поле подрешетки Fe были определены. Было выявлено, что величина обменного расщепления (обменное взаимодействие) в возбужденных состояниях не коррелируют с теоретическими факторами Ланде. Факторы Ланде возбужденных состояний были найдены экспериментально. В целом, локальные магнитные свойства в непосредственной близости от возбужденного иона существенно зависят от его электронного состояния. В частности: (1) в одном из возбужденной состояния появляется слабый ферромагнитный момент, (2) изменения типа локальных магнитной анизотропии происходит в некоторых возбужденных состояниях, и (3) в некоторых возбужденных состояниях энергетически благоприятных ориентация иона Nd3+ магнитного момента противоположны тем, что в основном состоянии. В некоторых возбужденных состояниях были обнаружены неэквивалентные центры Nd3+.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia.
Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine.

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.; Temerov, V. L.; Темеров, Владислав Леонидович; Russian Foundation [16-02-00273]; [Nsh-2886.2014.2]
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Peculiarities of magnetic properties of Nd3+ ions in the Nd0.5Gd0.5Fe3(BO3)4 crystal in the optically excited states 4(F7/2 + S3/2) and (4G9/2 + 2K13/2 + 4G7/2) / A. V. Malakhovskii [et al.] // J. Alloys Compd. - 2016. - Vol. 680. - P. 87-94, DOI 10.1016/j.jallcom.2016.04.088. - Cited References: 32. - The work was supported by the Russian Foundation for Basic Researches grant 16-02-00273 and by the President of Russia grant No Nsh-2886.2014.2. . - ISSN 0925-8388

РУБ Chemistry, Physical + Materials Science + Metallurgy & Metallurgical Engineering
Рубрики:
Single-crystal
GdFe3(BO3)4
Кл.слова (ненормированные):
f-f transitions -- Nd3+ ion -- Excited states -- Local magnetic properties
Аннотация: Polarized absorption spectra of f-f absorption bands 4I9/2 → 4(F7/2 + S3/2) and (4G9/2 + 2K13/2 + 4G7/2) in the Nd3+ ion in the Nd0.5Gd0.5Fe3(BO3)4 single crystal were studied as a function of temperature in the range of 2–40 K and as a function of magnetic field in the range of 0–65 kOe at 2 K. It was found out that the selection rules for f-f electron transitions substantially changed in the magnetically ordered state of the crystal, and they strongly depended on the orientation of the Fe and Nd ions magnetic moments relative to the light polarization. The splitting of the excited states of the Nd3+ ion in the exchange field of the Fe sublattice were determined. It was revealed that the value of the exchange splitting (the exchange interaction) did not correlate with the theoretical Landé factor. The Landé factors of the excited states were experimentally found. The local reorientation field induced metamagnetic transitions were observed in the excited states. In some excited states the energetically favorable orientation of the Nd3+ ion magnetic moment is opposite to that in the ground state.

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Держатели документа:
L. V. Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, Russian Federation
B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, Kharkov, Ukraine

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.; Temerov, V. L.; Темеров, Владислав Леонидович
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10.

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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