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Cascade of phase transitions in GdFe3(BO3)(4) / R. Z. Levitin [et al.] // JETP Letters. - 2004. - Vol. 79, Is. 9. - P. 423-426, DOI 10.1134/1.1776236. - Cited References: 8 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
CRYSTALS
ND
Аннотация: Cascade of phase transitions in GdFe3(BO3)(4) at 156, 37, and 9 K has been detected by specific heat measurements and further studied by Raman scattering and Nd3+ spectroscopic probe method. A weakly first-order structural phase transition at 156 K is followed by a second-order antiferromagnetic ordering phase transition at 37 K and a first-order spin-reorientational phase transition at 9 K. (C) 2004 MAIK "Nauka / Interperiodica".

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Держатели документа:
Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119992, Russia
Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia
Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Levitin, R. Z.; Popova, E. A.; Chtsherbov, R. M.; Vasiliev, A. N.; Popova, M. N.; Chukalina, E. P.; Klimin, S. A.; van Loosdrecht, PHM; Fausti, D.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
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Crystal field and exchange interactions in the SmFe3(BO3)4 multiferroic / M. N. Popova [et al.] // J. Exp. Theor. Phys. - 2014. - Vol. 118, Is. 1. - P. 111-123, DOI 10.1134/S1063776114010142. - Cited References: 22. - This work was supported by the Russian Foundation for Basic Research (project no. 13-02-00787) and the basic research program Quantum Mesoscopic and Disordered Structures of the Presidium of the Russian Academy of Sciences. . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary

Аннотация: The optical spectra of oriented SmFe3(BO3)4 single crystals are studied in the region of the f-f transitions in the Sm3+ ion by Fourier spectroscopy. The energies, the symmetry properties, and the exchange splittings of the Stark sublevels of the ground and 17 excited multiplets of the Sm3+ ion in a crystal field of symmetry D 3 are determined from the measured temperature dependences of polarized-radiation absorption spectra. The parameters of the crystal field acting on samarium ions and the parameters of the exchange interaction between Sm3+ and Fe3+ ions are found. The anisotropy of the effective exchange interaction is shown to be substantially stronger than the magnetic anisotropy, due to a strong crystal-field-induced mixing of the ground and excited multiplets.

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Публикация на русском языке Исследование кристаллического поля и обменных взаимодействий в мультиферроике SmFe3( BO3)4 [Текст] / М. Н. Попова [и др.] // Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 145 Вып. 1. - С. 128-142

Держатели документа:
Russian Acad Sci, Inst Spect, Moscow 142190, Russia
Kazan Privolzhsky Fed Univ, Kazan 420008, Russia
State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Oblast, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Popova, M. N.; Chukalina, E. P.; Malkin, B. Z.; Erofeev, D. A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Research [13-02-00787]; basic research program Quantum Mesoscopic and Disordered Structures of the Presidium of the Russian Academy of Sciences
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Crystal-field and exchange-interaction parameters formultiferroic ErFe3(BO3)4 / D. A. Erofeev [et al.] // Moscow International Symposium on Magnetism (MISM-2017) : 1-7 July 2017 : book of abstracts. - 2017. - Ст. 4OR-F-2. - P. 657

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Доп.точки доступа:
Erofeev, D. A.; Chukalina, E. P.; Yablunovsky, A.; Popova, M. N.; Попова, Марина Николаевна; Malkin, B. Z.; Gudim, I. A.; Гудим, Ирина Анатольевна; Moscow International Symposium on Magnetism(7 ; 2017 ; Jul. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
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High-resolution optical spectroscopy and modeling of spectral and magnetic properties of multiferroic ErFe3(BO3)4 / M. N. Popova, E. P. Chukalina, D. S. Erofeev [et al.] // Phys. Rev. B. - 2020. - Vol. 101, Is. 20. - Ст. 205108, DOI 10.1103/PhysRevB.101.205108. - Cited References: 38. - Financial support of the Russian Science Foundation under Grant No. 19-12-00413 is acknowledged. . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
F-F TRANSITIONS
   ENERGY-LEVELS
   ER3+ IONS
   GROWTH
Аннотация: We carried out the high-resolution broadband temperature-dependent polarized optical spectroscopy and theoretical studies of ErFe3(BO3)4 single crystals in the paramagnetic and antiferromagnetic (T˂TN=39K) phases. On the basis of the experimentally determined 45 crystal-field (CF) levels of Er3+ ions at sites with the C2 point symmetry, CF calculations were performed, a set of physically grounded CF parameters was obtained and used to model the temperature dependences of the Er magnetic moments measured in neutron-scattering experiments, as well as the magnetic susceptibility and magnetization of the compound; the contributions of the quasi-one-dimensional iron magnetic subsystem were calculated in the frame of the previously developed self-consistent four-particle cluster model. The modeling strongly supports an easy-plane collinear structure of iron magnetic moments and excludes earlier proposed additional magnetic phase.

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Держатели документа:
Russian Acad Sci, Inst Spect, Moscow 108840, Russia.
Natl Res Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141701, Moscow Region, Russia.
LV Kirenskii Inst Phys, Siberian Branch RAS, Krasnoyarsk 660036, Russia.
Kazan Fed Univ, Kazan 420008, Russia.

Доп.точки доступа:
Popova, M. N.; Chukalina, E. P.; Erofeev, D. S.; Jablunovskis, A.; Gudim, I. A.; Гудим, Ирина Анатольевна; Malkin, B. Z.; Russian Science FoundationRussian Science Foundation (RSF) [19-12-00413]
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High-resolution optical spectroscopy, magnetic properties, and single-crystal neutron diffraction of multiferroic HoFe3(BO3)4: Magnetic structure / M. N. Popova, E. P. Chukalina, D. A. Erofeev [et al.] // Phys. Rev. B. - 2021. - Vol. 103, Is. 9. - Ст. 094411, DOI 10.1103/PhysRevB.103.094411. - Cited References: 65. - Financial support of the Russian Science Foundation under Grant No. 19-12-00413 is acknowledged. I.V.G. acknowledges financial support of the neutron scattering studies from the Russian Foundation for Basic Research under Grant No. 20-02-00109. The analysis of the measured neutron diffraction data was performed by A.A.M. with support of the Russian Science Foundation under Grant No. 16-12-10531 . - ISSN 2469-9950
Кл.слова (ненормированные):
Antiferromagnetic structures -- Elastic neutron scattering -- High-resolution spectroscopy -- Magnetic susceptibility tensors -- Magnetoelectric properties -- Neutron diffraction measurements -- Single-crystal neutron diffraction -- Temperature dependencies
Аннотация: The magnetic structure is usually determined by the neutron diffraction measurements. However, in the case of complex multisublattice magnetics, this method fails to give an unambiguous result. Here, on the example of multiferroic HoFe3(BO3)4, we show that in the case of rare-earth (RE) compounds the right magnetic structure can be determined by additionally using optical spectroscopy and a theoretical analysis based on spectroscopic data. HoFe3(BO3)4 demonstrates a series of phase transitions and interesting magnetic and magnetoelectric properties. The available information on the magnetic structure of the compound, necessary for understanding and utilizing these properties, is contradictory. To resolve the existing ambiguities, we apply a combined approach. The high-resolution spectroscopy data deliver a set of the Ho3+ crystal-field (CF) levels in the paramagnetic and both easy-plane and easy-axis magnetic phases. These data are used to determine CF and Ho3+-Fe3+ exchange parameters and, then, to calculate the temperature dependencies of the magnetic susceptibility tensor of HoFe3(BO3)4. Based on these calculations, we suggest an easy-plane antiferromagnetic structure with a collinear arrangement of the Fe spins along the a axis and induced noncolinear moments of magnetically nonequivalent Ho ions. The suggested structure is further confirmed by single-crystal elastic neutron scattering experiments. We argue that specific features of the magnetic properties of RE iron borates isostructural to HoFe3(BO3)4 are governed by the energy patterns and the symmetry properties of the wave functions of the lower CF levels of the RE ground multiplet in the crystal field of the C2 symmetry.

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Держатели документа:
Institute of Spectroscopy, Russian Academy of Sciences, Moscow, Troitsk, 108840, Russian Federation
L. V. Kirensky Institute of Physics, Siberian Branch of Ras, Krasnoyarsk, 660036, Russian Federation
National Research Center "kurchatov Institute", B.P. Konstantinov Petersburg Nuclear Physics Institute, Gatchina, 188300, Russian Federation
Laboratoire Leon Brillouin, CEA-CNRS, CE-Saclay, Gif-sur-Yvette, 91191, France
Prokhorov General Physics Institute, Ras, Moscow, 119991, Russian Federation
Kazan Federal University, Kazan, 420008, Russian Federation

Доп.точки доступа:
Popova, M. N.; Chukalina, E. P.; Erofeev, D. A.; Gudim, I. A.; Гудим, Ирина Анатольевна; Golosovsky, I. V.; Gukasov, A.; Mukhin, A. A.; Malkin, B. Z.
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High-resolution spectroscopy of HoFe3(BO3)4 crystal: a study of phase transitions / D. A. Erofeev [et al.] // Opt. Spectrosc. - 2016. - Vol. 120, Is. 4. - P. 558-565, DOI 10.1134/S0030400X16040056. - Cited References:30. - This work was supported by the Russian Scientific Foundation, grant no. 14-12-01033. . - ISSN 0030-400X. - ISSN 1562-6911

РУБ Optics + Spectroscopy
Рубрики:
Magnetoelastic interactions
GdFE3(BO3)4
Аннотация: The transmission spectra of HoFe3(BO3) multiferroic single crystals are studied by optical Fourier-transform spectroscopy at temperatures of 1.7–423 K in polarized light in the spectral range 500–10 000 cm–1 with a resolution up to 0.1 cm–1. A new first-order structural phase transition close to the second-order transition is recorded at Tc = 360 K by the appearance of a new phonon mode at 976 cm–1. The reasons for considerable differences in Tc for different samples of holmium ferroborate are discussed. By temperature variations in the spectra of the f–f transitions in the Ho3+ ion, we studied two magnetic phase transitions, namely, magnetic ordering into an easy-plane structure as a second-order phase transition at TN = 39 K and spin reorientation from the ab plane to the c axis as a first-order phase transition at TSR = 4.7 ± 0.2 K. It is shown that erbium impurity in a concentration of 1 at % decreases the spin-reorientation transition temperature to TSR = 4.0 K.

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Публикация на русском языке Спектроскопия высокого разрешения кристалла HoFe3(BO3)4: исследование фазовых переходов [Текст] / Д. А. Ерофеев [и др.] // Оптика и спектроскопия : Наука, 2016. - Т. 120 № 4. - С. 588-595

Держатели документа:
Russian Acad Sci, Inst Spect, Moscow 108840, Russia.
State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Oblast, Russia.
Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Erofeev, D. A.; Chukalina, E. P.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Popova, M. N.; Russian Scientific Foundation [14-12-01033]
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High-resolution spectroscopy, crystal-field calculations, and quadrupole helix chirality of DyFe3(BO3)(4) / M. N. Popova [et al.] ; ed. E. A. Vinogradov [et al.] // XXV Congress on Spectroscopy. - 2017. - Vol. 132. - Ст. 03041. - (EPJ Web of Conferences), DOI 10.1051/epjconf/201713203041. - Cited References:2 . - ISSN 2100-014X

РУБ Spectroscopy

Аннотация: High-resolution polarized transmission spectra of DyFe3(BO3)(4) single crystals were investigated in broad spectral (10-23000 cm(-1)) and temperature (3.5-300 K) ranges. Energies of the dysprosium levels in the paramagnetic and antiferromagnetic phases were determined. On the basis of these data and preliminary calculations in the frameworks of the exchange-charge model, we determined the crystal-field and Dy-Fe exchange interaction parameters of the Dy3+ ions at sites with the point C-2 symmetry corresponding to the enantiomorphic P3(1)21 and P3(2)21 space groups. The values of electronic quadrupole moments of the Dy3+ ions were calculated, which enabled us to interpret results of the work [Usui et al., Nature Mater. 13, 611 (2014)] on the observation of domains of different quadrupole chirality in DyFe3(BO3)(4).

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Доп.точки доступа:
Popova, M. N.; Попова, Марина Николаевна; Malkin, B. Z.; Stanislavchuk, T. N.; Chukalina, E. P.; Boldyrev, K. N.; Болдырев, Кирилл Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Vinogradov, E.A. \ed.\; Naumov, A.V. \ed.\; Gladush, M.G. \ed.\; Karimullin, K.R. \ed.\; Congress on Spectroscopy(25 ; 2016 ; Oct ; 03-07 ; Troitsk)
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    Holmium iron borate: high-resolution spectroscopy and crystal-field parameters / D. A. Erofeev [et al.] ; ed. E. A. Vinogradov [et al.] // XXV Congress on Spectroscopy. - 2017. - Vol. 132. - Ст. 03013. - (EPJ Web of Conferences), DOI 10.1051/epjconf/201713203013. - Cited References:4 . - ISSN 2100-014X
   Перевод заглавия: Гольмиевый ферроборат: спектроскопия высокого разрешения и параметры кристаллического поля

РУБ Spectroscopy

Аннотация: High-resolution transmission spectra of HoFe3(BO3)(4) single crystals were measured in broad spectral (5000-23000 cm(-1)) and temperature (1.7-300 K) ranges. Crystal-field energies of the Ho3+ ions were determined for a paramagnetic and easy-axis antiferromagnetic phases of the compound. On the basis of these data and of preliminary crystal-field calculations in the frame of the exchange-charge model, crystal-field parameters were found. A parameter of the isotropic Ho-Fe exchange interaction was estimated.
Спектры пропускания высокого разрешения монокристаллов HoFe3(BO3)4 измерялись в широком спектральном диапазоне (5000-23000 см-1) при температурах от 1,7 до 300 К. Определены энергии кристаллического поля ионов Ho3+ для парамагнитной и легкоосной антиферромагнитных фаз соединения. На основе этих данных и предварительных расчетов кристаллического поля в рамках модели обменного заряда были найдены параметры кристаллического поля. Оценен параметр изотропного обменного взаимодействия Ho-Fe.

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Доп.точки доступа:
Erofeev, D. A.; Chukalina, E. P.; Popova, M. N.; Попова, Марина Николаевна; Malkin, B. Z.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Vinogradov, E.A. \ed.\; Naumov, A.V. \ed.\; Gladush, M.G. \ed.\; Karimullin, K.R. \ed.\; Congress on Spectroscopy(25 ; 2016 ; Oct ; 03-07 ; Troitsk)
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Improving one’s understanding of magnetic properties of SmFe3(BO3)4 by means of spectroscopic data [Текст] / E. P. Chukalina [et al.] // Moscow int. Symp. on Magnet. (MISM-2014) : Book of abstracts. - 2014. - Ст. 30PO-M-22. - P. 279 . - ISBN 978-5-91978-025-0

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Доп.точки доступа:
Chukalina, E. P.; Malkin, B. Z.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Popova, M. N.; Moscow International Symposium on Magnetism(6 ; 2014 ; 29 June-3 July ; Moscow); Московский государственный университет им. М.В. Ломоносова
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10.

Investigation of the iron borates DyFe3(BO3)(4) and HoFe3(BO3)(4) by the method of Er3+ spectroscopic probe / T. N. Stanislavchuk [et al.] // Phys. Lett. A. - 2007. - Vol. 368, Is. 5. - P. 408-411, DOI 10.1016/j.physleta.2007.04.044. - Cited References: 16 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
GDFE3(BO3)(4)
CRYSTALS
Кл.слова (ненормированные):
rare-earth iron borates -- magnetic ordering -- optical spectroscopy -- Magnetic ordering -- Optical spectroscopy -- Rare-earth iron borates
Аннотация: Temperature-dependent high-resolution optical spectra of the Er3+ probe ion in DyFe3(BO3)(4) and HoFe3(BO3)(4) are reported. The data provide the temperature of magnetic ordering and direction of the Fe3+ magnetic moments. Both compounds order magnetically at T-N = 39 +/- 1K. The magnetic structure of DyFe3(BO3)(4) is of the easy-axis type, while that of HoFe3(BO3)(4) is of the easy-plane type. The role of anisotropic interactions between the iron and the rare-earth subsystems is discussed. (c) 2007 Elsevier B.V. All rights reserved.

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Держатели документа:
Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia
LV Kirenskii Inst Phys, RAS, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of Spectroscopy, Russian Academy of Sciences, 142190 Troitsk, Moscow region, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch, RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Stanislavchuk, T. N.; Chukalina, E. P.; Popova, M. N.; Bezmaternykh, L. N.; Gudim, I. A.; Гудим, Ирина Анатольевна
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