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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pankrats A. I., Petrakovskii G. A., Bezmaternykh L. N., Bayukov O. A.
Заглавие : Antiferromagnetic resonance and phase diagrams of gadolinium ferroborate GdFe3(BO3)(4)
Разночтения заглавия :авие SCOPUS: Antiferromagnetic resonance and phase diagrams of gadolinium ferroborate GdFe3(BO3)4
Место публикации : J. Exp. Theor. Phys.: AMER INST PHYSICS, 2004. - Vol. 99, Is. 4. - P766-775. - ISSN 1063-7761, DOI 10.1134/1.1826168
Примечания : Cited References: 16
Ключевые слова (''Своб.индексиров.''): anisotropy--antiferromagnetic materials--antiferromagnetism--phase diagrams--resonance--single crystals--antiferromagnetic resonance--antiferromagnets--crystal axis--transition fields--gadolinium compounds
Аннотация: Antiferromagnetic resonance in single crystals of rhombohedral gadolinium ferroborate GdFe3(BO3)(4) was studied. The frequency-field dependences of antiferromagnetic resonance over the frequency range 26-70 GHz and the temperature dependences of resonance parameters for magnetic fields oriented along the crystal axis and in the basal plane were determined. It was found that the iron subsystem, which can be treated as a two-sublattice antiferromagnet with anisotropy of the easy-plane type, experienced ordering at T = 38 K. At temperatures below 20 K, the gadolinium subsystem with the opposite anisotropy sign strongly influenced the anisotropic properties of the crystal. This resulted in a spontaneous spin-reorientation transition from the easy-plane to the easy-axis state at 10 K. Below 10 K, magnetic field-induced transitions between the states were observed. Experimental phase diagrams on the temperature-magnetic field plane were constructed for fields oriented along the crystal axis and in the basal plane. A simple model was used to calculate the critical transition fields. The results were in close agreement with the experimental values measured at T = 4.2 K for both field orientations. (C) 2004 MAIK "Nauka / Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kobets M.I., Dergachev K.G., Khatsko E.N., Gnatchenko S.L., Bezmaternykh L. N., Temerov V. L.
Заглавие : Antiferromagnetic resonance in ferroborate NdFe3(BO3)(4)
Место публикации : Physica B. - 2011. - Vol. 406, Is. 18. - P.3430-3435. - SEP 15. - ISSN 0921-4526, DOI 10.1016/j.physb.2011.06.014. - ISSN 1873-2135
Примечания : Cited Reference Count: 19
Предметные рубрики: Physics, Condensed Matter
Ключевые слова (''Своб.индексиров.''): antiferromagnet--resonance--multiferroics--commensurate-incommensurate phase
Аннотация: The AFMR spectra of the NdFe3(BO3)(4) crystal are measured in a wide range of frequencies and temperatures. It is found that by the type of its magnetic anisotropy the compound is an easy-plane antiferromagnet with a weak anisotropy in the basal plane. The effective magnetic parameters are determined: anisotropy fields H-a1 = 1.14 kOe and H-a2 = 60 kOe and magnetic excitation gaps Delta v(1) = 101.9 GHz and Delta v(2) = 23.8 GHz. It is shown that commensurate-incommensurate phase transition causes a shift in resonance field and a considerable change in absorption line width. At temperatures below 4.2 K nonlinear regimes of AFMR excitation at low microwave power levels are observed. (C) 2009 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Eremin E. V., Gudim I. A., Temerov V. L., Smolyakov D. A., Molokeev M. S.
Заглавие : Comparing the magnetic and magnetoelectric properties of the SmFe3(BO3)4 ferroborate single crystals grown using different solvents
Коллективы : Russian Foundation for Basic Research (RFBR) [18-02-00696_a]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [18-42-240011 p_a]
Место публикации : J. Cryst. Growth. - 2019. - Vol. 518. - P.1-4. - ISSN 0022-0248, DOI 10.1016/j.jcrysgro.2019.04.017. - ISSN 1873-5002(eISSN)
Примечания : Cited References: 17. - This study was supported by the Russian Foundation for Basic Research (RFBR) according to the research projects No. 18-02-00696_a and RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund by project No. 18-42-240011 p_a.
Предметные рубрики: POLARIZATION
FEATURES
Ключевые слова (''Своб.индексиров.''): impurities--growth from solutions--single crystal growth--borates--ferroelectric materials--magnetic materials
Аннотация: SmFe3(BO3)4 single crystals have been grown from the bismuth trimolybdate and lithium tungstate-based melt–solutions. Samarium ferroborate single crystals were grown first from the lithium–tungstate flux. The magnetic and magnetoelectric properties of the synthesized crystals have been compared. It is shown that the SmFe3(BO3)4 ferroborate grown from the bismuth trimolybdate-based melt–solution contains impurities of Bi3+ ions (∼5% at.), which replace Sm3+ ions, while the SmFe3(BO3)4, ferroborate grown from the lithium tungstate-based melt–solution contains minor or zero amounts of such impurities. The magnetoelectric and magnetodielectric effects with the Bi3+ admixture appeared 1.5× stronger than in SmFe3(BO3)4; this is probably due to twinning.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Frolov K. V., Lyubutin I. S., Alekseeva O. A., Smirnova E. S., Verin I. A., Temerov V. L., Bezmaternykh L. N., Gudim I. A., Artemov V. V., Dmitrieva T. V.
Заглавие : Dynamics of structural and magnetic phase transitions in ferroborate YFe3(BO3)4
Место публикации : J. Alloys Compd. - 2018. - Vol. 748. - P.989-994. - ISSN 09258388 (ISSN), DOI 10.1016/j.jallcom.2018.03.243
Примечания : Cited References: 58. - We thank Dr. A.P. Dudka for help in the low temperature XRD measurements and Dr. D.Yu. Chernyshov for help in the synchrotron XRD measurements. This study was supported by the Federal Agency of Scientific Organizations (Agreement No 007-ГЗ/Ч3363/26 ) in parts of energy-dispersive X-ray microanalysis, high-temperature XRD, and Mossbauer measurements, by the Russian Foundation for Basic Research (project #17-02-00766а ) in parts of low-temperature XRD and Mossbauer measurements, Russian Ministry of Education and Science and performed using the equipment of the Shared Research Center of the Shubnikov Institute of Crystallography of FSRC “Crystallography and Photonics” RAS.
Ключевые слова (''Своб.индексиров.''): multiferroics--rare-earth compounds--x-ray diffraction--mossbauer spectroscopy--crystal structure
Аннотация: X-ray analysis of the YFe3(BO3)4 single crystal revealed different behavior of parameters of the crystal cell with an increase in temperature from 25 to 500 K. The parameters a and b initially increase monotonically and then rise sharply in the range between 360 and 380 K, which corresponds to the structural phase transition. The parameter c initially decreases linearly upon heating and then begins to increase, passing through a minimum at 90 K. In the interval of 200–500 K the parameter c grows linearly and does not undergo anomalies at the structural phase transition. The results of Mössbauer measurements at 57Fe nuclei in the paramagnetic phase of YFe3(BO3)4 correlate well with the XRD data, but they do not separate the two structural states of iron ions Fe1 and Fe2 arising in the P3121 phase during the structural phase transition. The temperature of the magnetic phase transition TN = 39.42(16) K is established, below which the iron ions form a 3D magnetic order of the Heisenberg type. The calculated “Mössbauer” Debye temperature ΘM = 340(2) K turned out to be three times lower than the Debye temperature of the entire crystal lattice TD = 1020 K. Mössbauer data indicate a weak bonding between the helicoidal chains of iron and the rest of the crystal lattice.Рентгеновский анализ монокристалла YFe3(bo3-серии)4 выявил различие в поведении параметров кристаллической ячейки с увеличением температуры от 25 до 500 к. Параметры a и b сначала монотонно возрастают, а затем резко поднимется в диапазон между 360 и 380 К, что соответствует структурному фазовому переходу. Параметр c сначала линейно уменьшается при нагревании, а затем начинает возрастать, проходя через минимум при 90 K. В интервале 200-500 K параметр c растет линейно и не претерпевает аномалий при структурном фазовом переходе. Результаты Мёсбауэровской спектроскопии ядер 57Fe в парамагнитной фазе в YFe3(BO3)4 коррелируют с РСА, но они не разделяют двух структурных состояний ионов железа Fe1 и Fe2, возникающие в фазе P3121 в процессе структурного перехода. Установили температуру магнитного фазового перехода TN= 39.42(16) К, в результате которого ионы железа образуют 3D магнитный порядок типа Гейзенберга. Рассчитанная по Мёссбауэру Дебаевская температура QM= 340(2) K оказалась в три раза ниже температуры Дебая внутри кристаллической решетки TD= 1020 K. Данные Мёсбауэра указывают на слабую связь между геликоидальными цепочками железной и остальных кристаллических решеток.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gavrichkov V. A., Malakhovskii A. V., Ovchinnikov S. G.
Заглавие : Effect of optical f - f excitations on the Nd-Fe exchange interaction in Nd ferroborate with multiferroic properties
Коллективы : RFBRRussian Foundation for Basic Research (RFBR) [19-02-00034]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Krasnoyarsk Regional Fund of Science [20-42-240016]; Government of Krasnoyarsk Territory
Место публикации : Phys. Rev. B. - 2021. - Vol. 104, Is. 6. - Ст.064445. - ISSN 2469-9950, DOI 10.1103/PhysRevB.104.064445. - ISSN 2469-9969(eISSN)
Примечания : Cited References: 28. - The reported study was supported by the RFBR Grant 19-02-00034. V.A.G. is also grateful to the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science according to the research project "Studies of superexchange and electron-phonon interactions in correlated systems as a basis for searching for promising functional materials" No. 20-42-240016
Предметные рубрики: LOCAL MAGNETIC-PROPERTIES
SINGLE-CRYSTAL
EXCITED-STATES
Аннотация: We considered the effect of optical pumping at the f−f transitions frequency on d−f superexchange in the rare-earth antiferromagnetic ferroborate Nd0.5Gd0.5Fe3(BO3)4 between Nd3+ ions in the excited states of the 4G5/2, 2G7/2, and Fe3+ in the ground state 6A1. In the ferroborate, d−f superexchange is directly related to the strong magnetoelectric coupling observed in the ground state of the material. We show that under optical pumping at the frequency of f−f transitions 4I9/2↔(4G5/2+2G7/2) in the Nd3+ ion, the nature of the d−f interaction changes to FM. The phenomena can be explained by the occupation of the excited Nd3+ “spin pure” states with spin 1/2, or their mixing to the optically excited states with spin 3/2 due to the spin-orbit interaction. Near optically excited ions Nd3+, magnetic frustrations change from FM ordering under the d−f AFM interaction to AFM ordering under the FM interaction in the basal hexagonal plane.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Troyan I. A., Gavrilyuk A. G., Ovchinnikov S. G., Lyubutin I. S., Kazak N. V.
Заглавие : Electron transport in FeBO3 ferroborate at ultrahigh pressures
Место публикации : JETP Letters. - 2012. - Vol. 94, Is. 10. - P.748-752. - ISSN 0021-3640, DOI 10.1134/S0021364011220115
Примечания : Cited References: 22. - This work was supported by the Russian Foundation for Basic Research (project nos. 09-02-01527-a, 09-02-00127-a, 09-02-00171-a, 11-02-00291-a, and 11-02-00636-a), by the Ministry of Education and Science of the Russian Federation (state contract nos. 16.518.11.7021 and MK-5632.2010.2), and by the Division of Physical Sciences, Russian Academy of Sciences (program "Strong Electron Correlations").
Предметные рубрики: MAGNETIC COLLAPSE
TRANSITION
STATE
Аннотация: The electrical resistance of FeBO3 crystals at high and ultrahigh pressures (up to 198 GPa) and low temperatures has been measured using diamond anvil cells. It has found that in the high-pressure phase, 46 GPa ‹ P‹ 100 GPa, the activation energy E-ac decreases gradually from 0.55 to 0.3 eV according to a linear law. Its extrapolation to zero gives an estimated value of about 210 GPa for the pressure at which complete metallization is expected. However, above 100 GPa, the linear E-ac(P) dependence smoothly transforms to a nonlinear one. At the same time, the temperature dependence of the electrical resistance at fixed pressure significantly deviates from the Arrhenius activation law and does not obey the Mott law for the hopping conductivity. Experimental data demonstrate the dependence of the activation energy E-ac both on pressure and temperature. At T = 0, the gap tends to zero. Theoretical analysis shows that the decrease in E-ac upon cooling can be interpreted in terms of the transition of the low-spin FeBO3 phase to the magnetically ordered (anti-ferromagnetic) state.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zvyagina G. A., Zhekov K. R., Bilych I. V., Zvyagin A. A., Bezmaternykh L. N., Gudim, I. A., Temerov V. L.
Заглавие : Features of magnetoelastic properties of yttrium ferroborate at low temperatures
Коллективы : International Workshop Novel Trends in Physics of Ferroics (1; July 4-6; St. Petersburg, Russia)
Место публикации : First International Workshop Novel Trends in Physics of Ferroics. [[b]]NTPF-2014[[/b]], July 4-6, 2014, St. Petersburg, Russia : Book of abstracts. - 2014. - С. 59
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzmenko A. M., Shuvaev A., Dziom V., Pimenov A., Schiebl M., Mukhin A. A., Ivanov V. Yu., Bezmaternykh L. N., Pimenov A.
Заглавие : Giant gigahertz optical activity in multiferroic ferroborate
Коллективы : Russian Foundation for Basic Researches [12-02-01261, 12-02-31461 mol]; Austrian Science Funds [I815-N16, W1243]
Место публикации : Phys. Rev. B: American Physical Society, 2014. - Vol. 89, Is. 17. - Ст.174407. - ISSN 1098-0121, DOI 10.1103/PhysRevB.89.174407. - ISSN 1550-235X
Примечания : Cited References: 35. - This work was supported by the Russian Foundation for Basic Researches (Grants No. 12-02-01261 and No. 12-02-31461 mol) and by the Austrian Science Funds (Grants No. I815-N16 and No. W1243).
Предметные рубрики: RFE3(BO3)4
Аннотация: In contrast to the well-studied multiferroic manganites with a spiral structure, the electric polarization in multiferroic borates is induced within a collinear antiferromagnetic structure and can easily be switched by small static fields. Because of specific symmetry conditions, the static and dynamic properties in borates are directly connected, which leads to giant magnetoelectric and magnetodielectric effects. Here we prove experimentally that the giant magnetodielectric effect in samarium ferroborate, SmFe3(BO3)4, is of intrinsic origin and is caused by an unusually large electromagnon situated in the microwave range. This electromagnon reveals a strong optical activity exceeding 120 degrees of polarization rotation in a millimeter thick sample.В отличие от хорошо изученных мультиферроиков манганитов со спиральной структуры, электрическая поляризация в мультиферроиков боратов индуцируется в коллинеарной антиферромагнитной структуре и может легко переключаться небольшими статическими полями. Из-за специфических условий симметрии, статические и динамические свойства боратов непосредственно связаны, что приводит к гигантским магнитоэлектрическому и магнитодиэлектрическому эффектам. Здесь мы экспериментально доказываем, что гигантский магнитодиэлектрический эффект в самариевом ферробората, SmFe3 (BO3) 4, имеет самостоятельное происхождение и вызван необычно большим электромагноном, расположеным в микроволновом диапазоне. Это электромагнон показывает сильную оптическую активность, более 120 градусов вращения поляризации в миллиметровом образце.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Titova, Veronika, Gudim I. A.
Заглавие : Growth of single crystals of trigonal ferroborate Ho0,5Nd0,5Fe3(BO3)4 with the huntite structure depending on the crystallochemical growth conditions
Коллективы : Химия, физика, биология, математика: теоретические и прикладные исследования, международная научно-практическая конференция
Место публикации : Химия, физика, биология, математика: теоретические и прикладные исследования, международная научно-практическая конференция (34 ; 2020 ; 17 марта ; Москва). Химия, физика, биология, математика: теоретические и прикладные исследования: сб. статей по материалам XXXIV междун. науч.-практич. конф. - 2020. - Т. 3 (24). - P.123-129 (Шифр 42626963)
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sofronova S. N., Gerasimova Y. V., Vtyurin A. N., Gudim, I. A., Shestakov N. P., Ivanenko A. A.
Заглавие : Infrared absorption spectrum of HoFe3(BO3)4 crystal
Коллективы : RFBR [13-02-00825, 13-02-98041, SS-4828.2012.2]
Место публикации : Vib. Spectrosc.: Elsevier Science, 2014. - Vol. 72. - P.20-25. - ISSN 0924-2031, DOI 10.1016/j.vibspec.2014.02.005. - ISSN 1873-3697
Примечания : Cited References: 18. - The work was partially supported by the RFBR through Grants No. 13-02-00825 and 13-02-98041, SS-4828.2012.2.
Предметные рубрики: MAGNETOELASTIC INTERACTIONS
IRON
GDFE3(BO3)4
Ключевые слова (''Своб.индексиров.''): holmium ferroborate--infrared absorption
Аннотация: Infrared (IR) absorption spectra of HoFe3(BO3)4 crystal have been obtained in spectral range 30–7000 cm−1 at temperatures from 4 to 423 K. Vibrational frequencies have been simulated with ‘Lady’ software package both for high-temperature and low-temperature phases. The experimental spectra have been analyzed on the basis of calculated data, and interpreted within the framework of internal vibrations of ionic complexes of HoFe3(BO3)4 crystal lattice. The spectral range under study was observed to have no Davydov splitting of internal vibrational modes due to unit cell multiplication. No effects of magnetic ordering on the IR spectra of the crystal under study were observed in the low-temperature range.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kadomtseva A. M., Popov Y. F., Krotov S. S., Vorob'ev G. P., Popova E. A., Zvezdin A. K., Bezmaternykh L. N.
Заглавие : Investigation of the anomalies of the magnetoelectric and magnetoelastic properties of single crystals of the ferroborate GdFe3(BO3)(4) at phase transitions
Разночтения заглавия :авие SCOPUS: Investigation of the anomalies of the magnetoelectric and magnetoelastic properties of single crystals of the ferroborate GdFe3(BO 3)4 at phase transitions
Место публикации : Low Temp. Phys. - 2005. - Vol. 31, Is. 8-9. - P.807-813. - ISSN 1063-777X, DOI 10.1063/1.2008142; \b Физика низких температур
Примечания : Cited References: 14
Предметные рубрики: IRON BORATE GDFE3(BO3)(4)
OPTICAL SPECTROSCOPY
Аннотация: The transformation of various properties of gadolinium ferroborate single crystals at phase transitions, both spontaneous and induced by magnetic fields up to 200 kOe, is investigated theoretically and experimentally. Particular attention is paid to elucidating the role of magnetoelectric interactions and the change in them at spin-reorientation transitions accompanied by a change of magnetic symmetry. With that goal the magnetoelastic and magnetoelectric properties of the system are investigated over a wide range of temperatures for two orientations of the magnetic field, H parallel to c and H perpendicular to c, and a fundamental difference of the character of the field dependences of the magnetostriction and electric polarization is found. In the framework of a symmetry approach a description of the magnetic structures and their transformations in the system GdFe3(BO3)(4) is proposed, and an interpretation of the experimentally observed properties is given. (C) 2005 American Institute of Physics.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kurnosov V. S., Tsapenko V. V., Bezmaternykh L. N., Gudim, I. A.
Заглавие : IR spectroscopy of the low-frequency phonon spectrum of the TbFe3(BO3)(4) single-crystal
Место публикации : Low Temp. Phys.: American Institute of Physics, 2014. - Vol. 40, Is. 12. - P.1087-1096. - ISSN 1063, DOI 10.1063/1.4904002. - ISSN 10906517(eISSN)
Примечания : Cited References:27
Предметные рубрики: EARTH FERROBORATES RFe3(BO3)4
RAMAN-SCATTERING
TERBIUM FERROBORATE
Аннотация: A study of the IR reflectance spectra of the TbFe3(BO3)4 crystal. We determined the frequencies of the polar lattice phonons in the high-temperature R32, and low- temperature P3121, phases. All 8A 2 ⊕ 11E-modes were found in the high-temperature phase, with nine of them corresponding to lines of the absorption spectrum. In the low-temperature phase, of the 20A 2 ⊕ 35E-modes allowed by the symmetry of the crystal lattice, 20A 2 ⊕ 25E-modes were found.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzmenko A. M., Dziom V., Shuvaev A., Pimenov A., Schiebl M., Mukhin A. A., Ivanov V. Y., Gudim, I. A., Bezmaternykh L. N., Pimenov A.
Заглавие : Large directional optical anisotropy in multiferroic ferroborate
Место публикации : Phys. Rev. B: American Physical Society, 2015. - Vol. 92, Is. 18. - Ст.184409. - ISSN 10980121 (ISSN), DOI 10.1103/PhysRevB.92.184409
Примечания : Cited References: 44. - This work was supported by the Russian Foundation for Basic Research (14-02-91000, 15-02-07647, 14-02-00307, 13-02-12442, 15-42-04186), Sci. school-924.2014.2, and by the Austrian Science Fund (I815-N16, I1648-N27, W1243)
Предметные рубрики: DICHROISM
BIREFRINGENCE
RFe3(BO3)4
POLARIZATION
EXCITATIONS
RESONANCE
Cr2O3
Аннотация: One of the most fascinating and counterintuitive recent effects in multiferroics is directional anisotropy, the asymmetry of light propagation with respect to the direction of propagation. In such case the absorption in a material can be different for opposite directions. Besides absorption, different velocities of light for different directions of propagation may be also expected, which is termed directional birefringence. In this work, we demonstrate large directional anisotropy in multiferroic samarium ferroborate. The effect is observed for linear polarization of light in the range of millimeter wavelengths, and it survives down to low frequencies. The dispersion and absorption close to the electromagnon resonance can be controlled by external magnetic field and are fully suppressed in one direction. By changing the geometry of the external field, samarium ferroborate shows giant optical activity, which makes this material a universal tool for optical control: with a magnetic field as an external parameter it allows switching between two functionalities: polarization rotation and directional anisotropy.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zvyagina G. A., Zhekov K. R., Bilych I. V., Zvyagin A. A., Bezmaternykh L. N., Gudim I. A.
Заглавие : Low-temperature behavior of the magnetoelastic characteristics of praseodymium ferroborate
Место публикации : Low Temp. Phys. - 2010. - Vol. 36, Is. 4. - P.296-302. - ISSN 1063-777X, DOI 10.1063/1.3420962; \b Физика низких температур
Примечания : Cited References: 16
Предметные рубрики: CRYSTAL
STATE
ND
Аннотация: The behavior of the elastic moduli and sound absorption in a PrFe(3)(BO(3))(4) single crystal at low temperatures is studied. A transition of the magnetic subsystem into an antiferromagnetically ordered state is manifested in the temperature behavior of the sound velocities and absorption. The characteristic behavior of the elastic properties of PrFe(3)(BO(3))(4) in an external magnetic field is observed. A phenomenological theory that gives a qualitative description of the observed features is constructed. It is proposed that a weak magnetic moment exists in the crystal. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3420962]
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pankrats A. I., Petrakovskii G. A., Kartashev A., Eremin E. V., Temerov V. L.
Заглавие : Low-temperature magnetic phase diagram of HoFe3(BO3)(4) holmium ferroborate: a magnetic and heat capacity study
Разночтения заглавия :авие SCOPUS: Low-temperature magnetic phase diagram of HoFe3(BO 3)4 holmium ferroborate: A magnetic and heat capacity study
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 2009. - Vol. 21, Is. 43. - Ст.436001. - ISSN 0953-8984, DOI 10.1088/0953-8984/21/43/436001
Примечания : Cited References: 20
Предметные рубрики: SINGLE-CRYSTAL
DYFE3(BO3)(4)
ND3+
Ключевые слова (''Своб.индексиров.''): antiferromagnetic state--applied magnetic fields--characteristic temperature--crystal axis--heat capacities--low temperatures--magnetic field parallel--magnetic phase diagrams--magnetic phase transitions--magnetization jump--schottky anomaly--spin reorientation transitions--thermal measurements--antiferromagnetic materials--antiferromagnetism--holmium--magnetic fields--phase diagrams--single crystals--specific heat--phase transitions
Аннотация: We present the results of the magnetic and heat capacity study of a magnetic phase diagram of a HoFe3(BO3)(4) single crystal. Two magnetic phase transitions are found in the low-temperature region. The transition from the paramagnetic to easy-plane antiferromagnetic state occurs at T-N = 37.4 K and is independent of an applied magnetic field. The sharp heat capacity peaks and magnetization jumps corresponding to the spontaneous and field-induced spin-reorientation transitions between the easy-axis and easy-plane states are observed below 4.7 K. Also, the additional heat capacity peaks, which can be attributed to the Schottky anomalies with the field-dependent characteristic temperatures, are found. According to the magnetic and thermal measurement data, the magnetic phase diagrams of HoFe3(BO3)(4) for the magnetic field parallel and perpendicular to the crystal axis are constructed.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zvyagina G. A., Zhekov K. R., Bilych I. V., Kolodyazhnaya M. P., Zvyagin A. A., Bludov A. N., Pashchenko V. A., Gudim, I. A.
Заглавие : Low-temperature magnetic phase transitions in the multiferroic Nd0.9Dy0.1Fe3(BO3)4. Part 1. Transitions induced by magnetic fields directed along the trigonal symmetry axis. Spontaneous transitions with temperature changes
Место публикации : Low Temp. Phys.: American Institute of Physics, 2016. - Vol. 42, Is. 4. - P.273-279. - ISSN 1063-777X, DOI 10.1063/1.4947480. - ISSN 1090-6517(eISSN)
Примечания : Cited References:19
Предметные рубрики: Earth ferroborate Nd0.75Dy0.25Fe3(BO3)4
Magnetoelastic properties
NdFe3(BO3)4
Аннотация: The elastic and magnetic characteristics of single-crystal Nd0.9Dy0.1Fe3(BO3)4 are studied at low temperatures in zero magnetic field and in external fields H||C3. The temperature dependences of the acoustic mode velocities and the magnetic susceptibility manifest a transition of the magnetic subsystem into a magnetically ordered state and two successive, spontaneous spin-reorientation phase transitions. The possibility of a spontaneous transition into an incommensurate (spiral) magnetic phase in the crystal is discussed. It is shown that an external magnetic field directed along the trigonal axis of the crystal induces a sequence of spin-reorientation phase transitions. An H-Tphase diagram (H||C3) is constructed for this compound.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zvyagina G. A., Zhekov K. R., Bilych I. V., Zvyagin A. A., Bezmaternykh L. N., Gudim I. A.
Заглавие : Low-temperature phase transitions in the rare-earth ferroborate Nd0.75Dy0.25Fe3(BO3)(4)
Место публикации : Low Temp. Phys. - 2010. - Vol. 36, Is. 3. - P.279-281. - ISSN 1063-777X, DOI 10.1063/1.3331632; \b Физика низких температур
Примечания : Cited References: 10
Аннотация: The low-temperature behavior of the elastic characteristics of a Nd0.75Dy0.25Fe3(BO3)(4) single crystal has been studied. Features are found in the temperature and magnetic-field dependences of the velocity and absorption of transverse sound. These features are interpreted as being a manifestation of magnetic phase transitions in the compound studied. The H-T phase diagram is constructed. (c) 2010 American Institute of Physics. [doi:10.1063/1.3331632]
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Eremin E. V., Temerov V. L., Gudim I. A.
Заглавие : Magnetic and magnetoelectric properties of the Tb0.75Ho0.25Fe3(BO3)4 ferroborate
Коллективы : Russian Foundation for Basic Research [15-4204186_r_sibir'_a]; Ministry of Education and Science of the Russian Federation within the framework of the State Task for the Siberian Federal University for Implementation of Scientific Research [3.2534.2014/K]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2017. - Vol. 59, Is. 3. - P.550-554. - ISSN 1063-7834, DOI 10.1134/S1063783417030325. - ISSN 1090-6460(eISSN)
Примечания : Cited References:16. - This study was supported by the Russian Foundation for Basic Research (project no. 15-4204186_r_sibir'_a) and the Ministry of Education and Science of the Russian Federation within the framework of the State Task for the Siberian Federal University for Implementation of Scientific Research Works in 2014 (project no. 3.2534.2014/K).
Аннотация: Single crystals of the Tb0.75Ho0.25Fe3(BO3)4 ferroborate have been grown by the group method from a solution–melt based on bismuth trimolybdate. The magnetic and magnetoelectric properties of the ferroborate single crystals have been investigated in the temperature range from 4.2 to 300 K and in magnetic fields up to 9 T. Magnetically, this material is an antiferromagnet with the Néel temperature TN = 38.8 K and easy-axis anisotropy. The magnitude of the magnetoelectric polarization has been found to be more than 1.5–2.0 times greater than the sum of the polarizations induced by the magnetic field for the ferroborates TbFe3(BO3)4 and HoFe3(BO3)4 taken in the corresponding shares.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popova E. A., Tristan N., Hess C., Klingeler R., Buchner B., Bezmaternykh L. N., Temerov V. L., Vasil'ev A. N.
Заглавие : Magnetic and thermal properties of single-crystal NdFe3(BO3)(4)
Разночтения заглавия :авие SCOPUS: Magnetic and thermal properties of single-crystal NdFe3(BO 3)4
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2007. - Vol. 105, Is. 1. - P105-107. - ISSN 1063-7761, DOI 10.1134/S1063776107070229
Примечания : Cited References: 4
Ключевые слова (''Своб.индексиров.''): antiferromagnetism--magnetic field effects--magnetic properties--rare earths--single crystals--thermodynamic properties--antiferromagnetic transition--crystallographic axes--kramers doublet--neodymium ferroborate--neodymium compounds
Аннотация: The neodymium ferroborate NdFe3(BO3)(4) undergoes an antiferromagnetic transition at T-N = 30 K, which manifests itself as a lambda-type anomaly in the temperature dependence of the specific heat C and as inflection points in the temperature dependences of the magnetic susceptibility chi measured at various directions of an applied magnetic field with respect to the crystallographic axes of the sample. Magnetic ordering occurs only in the subsystem of Fe3+ stop ions, whereas the subsystem of Nd3+ stop ions remains polarized by the magnetic field of the iron subsystem. A change in the population of the levels of the ground Kramers doublet of neodymium ions manifests itself as Schottky-type anomalies in the C(T) and chi(T) dependences at low temperatures. At low temperatures, the magnetic properties of single-crystal NdFe3(BO3)(4) are substantially anisotropic, which is determined by the anisotropic contribution of the rare-earth subsystem to the magnetization. The experimental data obtained are used to propose a model for the magnetic structure of NdFe3(BO3)(4).
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zvyagina G. A., Zhekov K. R., Zvyagin A. A., Gudim, I. A., Bilych I. V.
Заглавие : Magnetic anisotropy in the basal plane of the rare-earth ferroborate Nd0.75Dy0.25Fe3(BO3)4
Место публикации : Low Temp. Phys.: American Institute of Physics, 2012. - Vol. 38, Is. 5. - P.446-449. - ISSN 1063-777X, DOI 10.1063/1.4707947
Примечания : Cited References: 12
Аннотация: The magneto-acoustic behavior of the rare-earth multiferroic Nd0.75Dy0.25Fe3(BO3)(4) in external magnetic fields lying in the basal plane of the crystal is studied. The data confirm the existence of a magnetic anisotropy in this plane and of magnetic phase transitions in the crystal caused by this anisotropy. H-T phase diagrams are constructed for the cases H parallel to C-2 and H perpendicular to C-2. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4707947]
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