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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chukalina E. P., Kuritsin D. Y., Popova M. N., Bezmaternykh L. N., Kharlamova S. A., Temerov V. L.
Заглавие : Magnetic ordering of NdFe3(BO3)(4) studied by infrared absorption spectroscopy
Разночтения заглавия :авие SCOPUS: Magnetic ordering of NdFe3(BO3)4 studied by infrared absorption spectroscopy
Место публикации : Phys. Lett. A. - 2004. - Vol. 322, Is. 3-4. - P.239-243. - ISSN 0375-9601, DOI 10.1016/j.physleta.2003.12.062
Примечания : Cited References: 8
Предметные рубрики: CRYSTALS
Ключевые слова (''Своб.индексиров.''): ferroborates--fourier-transform spectroscopy--magnetic ordering--ferroborates--fourier-transform spectroscopy--magnetic ordering--iron--neodymium--absorption spectroscopy--article--electronics--infrared spectroscopy--magnetism--molecular interaction--molecular physics--temperature
Аннотация: We report the first measurements of the optical spectra of NdFe3(BO3)(4), a promising material for optoelectronics. Exchange splitting of Nd3+ spectral lines due to magnetic interactions in a magnetically ordered state was observed. The temperature dependences of the exchange splitting and of the linewidth point to the temperature T-c 33 +/- 1K of the magnetic ordering in both iron and neodymium. magnetic subsystems. 2004 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : 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.
Заглавие : Cascade of phase transitions in GdFe3(BO3)(4)
Место публикации : JETP Letters. - 2004. - Vol. 79, Is. 9. - P.423-426. - ISSN 0021-3640, DOI 10.1134/1.1776236
Примечания : Cited References: 8
Предметные 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chukalina E. P., Bezmaternykh L. N.
Заглавие : Spectroscopic study of magnetic phase transitions in NdxGd1-xFe3(BO3)(4)
Разночтения заглавия :авие SCOPUS: Spectroscopic study of magnetic phase transitions in NdxGd 1 - XFe3(BO3)4
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2005. - Vol. 47: 12th Feofilov Workshop on Spectroscopy of Crystal Activated by Rare-Earth and Transition-Metal Ions (SEP 22-25, 2004, Yekaterinburg, RUSSIA), Is. 8. - P1528-1531. - ISSN 1063-7834, DOI 10.1134/1.2014507
Примечания : Cited References: 10
Предметные рубрики: CRYSTALS
ND
Аннотация: Magnetic ordering and spin reorientation in iron borates NdxGd1 - xFe3(BO3)(4) (x = 0.01, 0.04, 0.25, 1.0) are studied using a rare-earth spectroscopic probe. (c) 2005 Pleiades Publishing, Inc.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popova M. N., Chukalina E. P., Stanislavchuk T. N., Malkin B. Z., Zakirov A. R., Antic-Fidancev E., Popova E. A., Bezmaternykh L. N., Temerov V. L.
Заглавие : Optical spectra, crystal-field parameters, and magnetic susceptibility of multiferroic NdFe3(BO3)(4)
Разночтения заглавия :авие SCOPUS: Optical spectra, crystal-field parameters, and magnetic susceptibility of multiferroic Nd Fe3 (B O3) 4
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 2007. - Vol. 75, Is. 22. - Ст.224435. - ISSN 1098-0121, DOI 10.1103/PhysRevB.75.224435
Примечания : Cited References: 22
Предметные рубрики: IRON BORATE GDFE3(BO3)(4)
CRYSTALLIZATION
SPECTROSCOPY
LASER
ND3+
Аннотация: We report high-resolution optical absorption spectra for NdFe3(BO3)(4) trigonal single crystal, which is known to exhibit a giant magnetoelectric effect below the temperature of magnetic ordering T-N=33 K. The analysis of the temperature-dependent polarized spectra reveals the energies and, in some cases, symmetries and exchange splittings of Nd3+ 84 Kramers doublets. We perform crystal-field calculations starting from the exchange-charge model, obtain a set of six real crystal-field parameters, and calculate wave functions and magnetic g factors. In particular, the values g(perpendicular to)=2.385 and g(parallel to)=1.376 were found for the Nd3+ ground-state doublet. We obtain B-loc=7.88 T and parallel to J(FN)parallel to=0.48 K for the values of the local effective magnetic field at liquid-helium temperatures at the Nd3+ site and the Nd-Fe exchange integral, respectively, using the experimentally measured Nd3+ ground-state splitting of 8.8 cm(-1). To check the reliability of our set of crystal-field parameters, we model the magnetic susceptibility data from literature. A dimer containing two nearest-neighbor iron ions in the spiral chain is considered to partly account for quasi-one-dimensional properties of iron borates, and then the mean-field approximation is used. The results of calculations with the exchange parameters for Fe3+ ions J(nn)=-6.25 K (intrachain interactions) and J(nnn)=-1.92 K (interchain interactions) obtained from fitting agree well with the experimental data.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stanislavchuk T. N., Chukalina E. P., Popova M. N., Bezmaternykh L. N., Gudim I. A.
Заглавие : Investigation of the iron borates DyFe3(BO3)(4) and HoFe3(BO3)(4) by the method of Er3+ spectroscopic probe
Разночтения заглавия :авие SCOPUS: Investigation of the iron borates DyFe3(BO3)4 and HoFe3(BO3)4 by the method of Er3+ spectroscopic probe
Место публикации : Phys. Lett. A: ELSEVIER SCIENCE BV, 2007. - Vol. 368, Is. 5. - P408-411. - ISSN 0375-9601, DOI 10.1016/j.physleta.2007.04.044
Примечания : Cited References: 16
Предметные рубрики: GDFE3(BO3)(4)
CRYSTALS
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chukalina E.P., Popova M.N., Bezmaternykh L.N., Gudim I.A.
Заглавие : Spectroscopic Study of the Mag netic Ordering in SmFe3(BO3)4
Место публикации : Physics Letters A. - 2010. - Vol. 374. - С. 1790-1792
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chukalina E. P., Popova M. N., Bezmaternykh L. N., Gudim I. A.
Заглавие : Spectroscopic study of the magnetic ordering in SmFe3(BO3)(4)
Коллективы :
Разночтения заглавия :авие SCOPUS: Spectroscopic study of the magnetic ordering in SmFe3(BO3)4
Место публикации : Phys. Lett. A: ELSEVIER SCIENCE BV, 2010. - Vol. 374, Is. 15-16. - P1790-1792. - ISSN 0375-9601, DOI 10.1016/j.physleta.2010.02.018
Примечания : Cited References: 20. - The authors thank B.Z. Malkin and S.A. Klinnin for helpful discussions and K.N. Boldyrev for participating in some low-temperatures measurements. This work was supported in part by the Russian Foundation for Basic Research (grants Nos. 10-02-01071 and 10-02-00765), and by the Russian Academy of Sciences under the Programs for Basic Research.
Предметные рубрики: IRON BORATE GDFE3(BO3)(4)
SINGLE-CRYSTAL
DYFE3(BO3)(4)
Ключевые слова (''Своб.индексиров.''): rare-earth iron borates--magnetic ordering--optical spectroscopy--magnetic ordering--optical spectroscopy--rare-earth iron borates
Аннотация: SmFe3(BO3)(4) belongs to the family of rare-earth RFe3(BO3)(4) multiferroics. We present the first measurements of the optical spectra of SmFe3(BO3)(4) (on single crystals) and report the data on the crystal-field levels and their symmetries for the ground multiplet H-6(5/2) [0 (Gamma(4)). 135 (Gamma(56)), and 220 (Gamma(4)) cm(-1)] and on the ground-state exchange splitting (13.2 cm(-1) at 1.7 K), important to interpret the magnetic, magnetoelectric, and thermodynamic properties of this compound. The observed exchange splitting of the Sm3+ Kramers doublets manifests the magnetic ordering in SmFe3(BO3)(4) at 32 +/- 1 K. From a comparison of the temperature-dependent spectra of the Sm3+ ion in SmFe3(BO3)(4) and in Nd-Gd mixed iron borate where the magnetic spin reorientation has been found earlier, we suggest the easy-plane arrangement of the Fe spins in SmFe3(BO3)(4). The samarium iron borate preserves the R32 (D-3(7)) crystal structure at all the investigated temperatures (down to 1.7 K). (C) 2010 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popova M. N., Chukalina E. P., Malkin B. Z., Erofeev D. A., Bezmaternykh L. N., Gudim, I. A.
Заглавие : Crystal field and exchange interactions in the SmFe3(BO3)4 multiferroic
Коллективы : 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
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2014. - Vol. 118, Is. 1. - P.111-123. - ISSN 1063-7761, DOI 10.1134/S1063776114010142. - ISSN 1090-6509
Примечания : 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.
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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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Chukalina E. P., Malkin B. Z., Bezmaternykh L. N., Gudim, I. A., Popova M. N.
Заглавие : Improving one’s understanding of magnetic properties of SmFe3(BO3)4 by means of spectroscopic data
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова
Место публикации : 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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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popova M. N., Chukalina E. P., Boldyrev K. N., Stanislavchuk T. N., Malkin B. Z., Gudim I. A.
Заглавие : Spectroscopy of f-f transitions, crystal-field calculations, and magnetic and quadrupole helix chirality in DyFe3(BO3)4 [Electronic resource]
Место публикации : ArXiv. - 2016. - Ст.1611.07092
Вид и объем ресурса: Electronic text data
Примечания : Cited References: 47. - This work was supported by the Russian Science Foundation (Grant No14-12-01033). I. A. G. thanks L. N. Bezmaternykh for useful comments concerning the crystal growth and the Russian Foundation for Basic Research for a financial support under Grant No 14-02-00307a.
Аннотация: Recently, quadrupole helix chirality and its domain structure was observed in resonant x-ray diffraction experiments on DyFe3(BO3)4 using circularly polarized x rays [T. Usui et al., Nature Materials 13, 611 (2014)]. We show that this effect can be explained quantitatively by calculating the quadrupole moments of the Dy3+ ions induced by the low-symmetry (C2) crystal-field (CF) component. In this work, the CF parameters for the Dy3+ ions in the P3121 (P3221) phase of DyFe3(BO3)4 are obtained from CF calculations based on the analysis of high-resolution temperature-dependent optical spectroscopy data. We also consider the helix chirality of the single-site magnetic susceptibility tensors of the Dy3+ ions in the paramagnetic P3121 (P3221) phase and suggest a neutron diffraction experiment to reveal it.
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