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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Turchin, Pavel P., Burkov, S. I., Turchin, Vladimir, I, Pletnev, Oleg N., Chulkova, Marina Yu, Nechepuryshina, Anastasia G.
Заглавие : Anisotropy of the electromechanical characteristics of SH-waves and Lamb waves in yttrium aluminum borate single crystals
Коллективы : Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0011]
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2022. - Vol. 15, Is. 1. - P.80-87. - ISSN 1997-1397, DOI 10.17516/1997-1397-2022-15-1-80-87; Журн. СФУ. Матем. и физика. - ISSN 2313-6022(eISSN)
Примечания : Cited References: 24. - The study was carried out within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (research project code FSRZ-2020-0011)
Аннотация: The anisotropy of the electromechanical properties of SH-waves and Lamb waves in yttrium aluminum borates, which are nonmagnetic representatives of the RMe3(BO3)4 single crystals family (where R=Y, La-Lu; M=Fe, Al, Cr, Ga, Sc) with unique properties of magnetoelectrics and multiferroics, has been studied. In the process of the numerical simulation of the acoustic waves characteristics, the values of linear electromechanical constants of YAl3(BO3)4 single crystals, previously measured by ultrasonic pulse echo and quasi-static methods, have been used.Исследована анизотропия электромеханичеких характеристик SH-волн и волн Лэмба в иттриевых алюмоборатах, которые являются немагнитным представителем семейства монокри- сталлов RMe3(BO3)4 (где R=Y, La-Lu; M=Fe, Al, Cr, Ga, Sc) с уникальными свойствами магнитоэлектриков и мультиферроиков. При численном моделировании характеристик акустических волн использованы значения линейных электромеханических постоянных монокристаллов YAl3(BO3)4, измеренных ранее ультразвуковым эхо-импульсным и квазистатическим методами.
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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) : Aplesnin S. S., Sitnikov M. N., Zhivul'ko A. M.
Заглавие : Change in the magnetocapacity in the paramagnetic region in a cation-substituted manganese selenide
Коллективы : Russian Foundation for Basic Research [17-32-50080, 16-52-00045 Bel_a, 3.5743.2017/6.7]
Место публикации : Phys. Solid State. - 2018. - Vol. 60, Is. 4. - P.673-680. - ISSN 1063-7834, DOI 10.1134/S1063783418040029. - ISSN 1090-6460(eISSN)
Примечания : Cited References:19. - This work is supported by the Russian Foundation for Basic Research (project no. 17-32-50080), grant no. 16-52-00045 Bel_a, and state task no. 3.5743.2017/6.7.
Предметные рубрики: MULTIFERROICS
Аннотация: The capacity and the dielectric loss tangent of a Gd x Mn1–xSe (x ≤ 0.2) solid solution have been measured in the frequency range 1–300 kHz without a magnetic field and in a magnetic field of 8 kOe in the temperature range 100–450 K, and the magnetic moment of the solid solution has been measured in a field of 8.6 kOe. The magnetocapacity effect and the change in the magnetocapacity sign have been observed in room temperature in the paramagnetic region. A correlation of the changes in the dielectric permittivity and the magnetic susceptibility with temperature has been revealed. The magnetocapacity is described using the model with orbital electron ordering and the Maxwell–Wagner model.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Kretinin V. V., Begisheva O. B.
Заглавие : Magnetoelectric Effect in a Paramagnetic Region in Gd0.15Mn0.85Se
Коллективы : Russian foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk region; Krasnoyarsk Regional Foundation for Science [18-42-240001, MK 591.2019.2, 3.5743.2017/6.7]
Место публикации : Phys. Solid State. - 2019. - Vol. 61, Is. 8. - P.1379-1382. - ISSN 1063-7834, DOI 10.1134/S1063783419080067. - ISSN 1090-6460(eISSN)
Примечания : Cited References: 16. - This work was supported by the Russian foundation for Basic Research, the Government of the Krasnoyarsk region, and Krasnoyarsk Regional Foundation for Science in the framework of the scientific project no. 18-42-240001 "Inversion of the sign of components of the magnetoelectric tensor in temperature in neodymium-substituted bismuth ferrite-garnet films," grant MK 591.2019.2, and state task no. 3.5743.2017/6.7.
Предметные рубрики: MULTIFERROICS
Аннотация: The electric polarization in a zero magnetic field and in a magnetic field of 12 kOe is measured in a GdxMn1 – xSe solid solution in the percolation concentration region in the temperature range 80–380 K. For composition x = 0.15, the polarization hysteresis and the dependence of the remanent polarization on magnetic field and temperature are determined. The hysteresis is explained in the model of migration polarization and the magnetoelectric effect is explained in the Maxwell–Wagner model.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Turchin P. P., Turchin V. I., Yurkevich S. V., Sukhodaev P. O., Raikova I. S.
Заглавие : Application of DMA 242 C for quasi-static measurements of piezoelectric properties of solids
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2020. - Vol. 13, Is. 1. - P.97-103. - ISSN 19971397 (ISSN), DOI 10.17516/1997-1397-2020-13-1-97-103; Журн. СФУ. Матем. и физика
Примечания : Cited References: 26. - The reported study was funded by Russian Foundation for Basic Research project no. 18-42-240016, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, to the research project: "Electromechanical Properties and Anisotropy of Acoustic Wave Propagation in Yttrium Aluminoborates Single Crystals"
Аннотация: An experimental device for quasi-static measurements of piezoelectric moduli dijk, based on the possibilities of precision variations in mechanical stresses with the device DMA 242 C in the frequency range 0-100 Hz has been developed. A special sample holder and a charge amplifier are used in the measuring scheme. The measurements of piezoelectric moduli values of trigonal piezoelectric single crystalls La3Ga5SiO14 (P321) and YAl3(BO3)4 (R32), as well as hexagonal ZnO (P63mc) have been carried out.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Flerov I. N., Mikhaleva E. A., Gorev M. V., Kartashev A. V.
Заглавие : Caloric and multicaloric effects in oxygen ferroics and multiferroics
Коллективы : Всероссийская конференция по физике сегнетоэлектриков
Место публикации : Phys. Solid State/ Всероссийская конференция по физике сегнетоэлектриков (20 ; 2014 ; 18-22 авг. ; Красноярск): MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 3. - P.429-441. - ISSN 1063, DOI 10.1134/S1063783415030075. - ISSN 10906460(eISSN)
Примечания : Cited References:53. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation (grant no. NSh-924.2014.2).
Предметные рубрики: PHASE-TRANSITIONS
MAGNETOCALORIC MATERIALS
ELECTROCALORIC MATERIALS
REFRIGERATION
CERAMICS
OXYFLUORIDES
Аннотация: The main problems of the current state-of-the-art research into the caloric effects observed in oxygen ferroics, multiferroics, and composites, as well as the influence of different factors (anisotropy, dimensional parameters, direct and indirect interferroic interactions) on these effects, have been considered. Possible ways to increase the caloric efficiency of materials have been analyzed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chukalina E. P., Jablunovskis A., Gudim I. A.
Заглавие : Study of the magnetic properties of neodymium and samarium iron borates by the method of erbium spectroscopic probe
Колич.характеристики :7 с
Место публикации : Opt. Spectrosc. - 2023. - Vol. 131, Is. 8. - P.630-636. - ISSN 0030400X (ISSN), DOI 10.1134/S0030400X23060024. - ISSN 15626911 (eISSN)
Примечания : Cited References: 30. - This paper was carried out under financial support of the Russian Science Foundation (grant № 19-12-00413)
Аннотация: Iron borates NdFe3(BO3)4 and SmFe3 (BO3)4 activated with 1% erbium, with ahuntite structure (space symmetry group R32) were investigated by the method of erbium spectroscopic probe. From an analysis of the temperature dependence of the transmission spectra in the region of the 4I15/2 → 4113/2 transition in the Er3+ ion, it was found that both studied compounds order antiferromagnetically at TN ≈ 33 K into an easy-plane magnetic structure. No other phase transitions were found.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chukalina E. P., Jablunovskis A., Gudim I. A.
Заглавие : Study of the magnetic properties of neodymium and samarium iron borates by the method of erbium spectroscopic probe
Место публикации : Opt. Spectrosc. - 2022. - Vol. 130, Is. 1. - P.98-104. - ISSN 0030400X (ISSN), DOI 10.21883/EOS.2022.01.52993.23-21. - ISSN 15626911 (eISSN)
Примечания : Cited References: 30. - This paper was carried out under financial support of the Russian Science Foundation (grant № 19-12-00413)
Аннотация: Iron borates NdFe3(BO3)4 and SmFe3(BO3)4 activated with 1% erbium, with a huntite structure (space symmetry group R32) were investigated by the method of erbium spectroscopic probe. From an analysis of the temperature dependence of the transmission spectra in the region of the 4I15/2 → 4I13/2 transition in the Er3+ ion, it was found that both studied compounds order antiferromagnetically at TN ≈ 33 K into an easy-plane magnetic structure. No other phase transitions were found.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Matveeva A. N., Zobkalo I. A., Meven M., Freidman A. L., Semenov S. V., Terentjev K. Yu., Pavlovskiy N. S., Kolkov M. I., Shaykhutdinov K. A., Hutanu V.
Заглавие : Complex interplay between 3d and 4f magnetic systems in multiferroic DyMnO3
Место публикации : J. Magn. Magn. Mater. - 2023. - Vol. 569. - Ст.170415. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2023.170415
Примечания : Cited References: 28. - The authors are grateful to S.V. Gavrilov for the technical assistance. This work was supported by the Russian Foundation for Basic Research grant # 19-52-12047, and DFG grant # SA 3688/1-1, also by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research projects number 18-42-243024 and 20-42-243008. The neutron data were obtained at the instrument HEiDi operated jointly by RWTH Aachen University and Jülich Centre for Neutron Science within JARA cooperation
Аннотация: Structural and magnetic properties of single crystals of DyMnO3 were investigated by neutron diffraction in order to study the peculiarities of 3d-4f interactions in this compound. Precise magnetic order and its detailed temperature evolution were determined using single crystal neutron diffraction. Elliptical cycloid on manganese subsystem below TCh = 19 K was confirmed, with temperature decrease the elipticity of the Mn magnetic structure reduces significantly, creating almost circular cycloid. Temperature evolution of the magnetic structure demonstrate specific hysteretic behavior. The results show a complex interplay between transition metal and rare earth magnetic sublattices leading to so-called “Mn- controlled” and “Dy- controlled” magnetic states. The strong and complicate 3d-4f interaction leads to the unusual very slow magnetic structure relaxation.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Partzsch S., Hamann-Borrero J. E., Mazzoli C., Herrero-Martin J., Valencia S., Feyerherm R., Dudzik E., Vasiliev A., Bezmaternykh L. N., Buchner B., Geck J.
Заглавие : Control of coexisting magnetic phases by electric fields in NdFe3(BO3)(4)
Коллективы : DFG [SFB 1143, GE 1647/2-1, HA6470/1-1]; Ministry of Education and Science of the Russian Federation [kappa2-2015-075]; Government of the Russian Federation [02.A03.21.0006]
Место публикации : Phys. Rev. B: American Physical Society, 2016. - Vol. 94, Is. 5. - Ст.054421. - ISSN 2469-9950, DOI 10.1103/PhysRevB.94.054421. - ISSN 2469-9969(eISSN)
Примечания : Cited References:29. - We thank H.-C. Walker for the technical support at ID20, and F. de Bergevin, C. Detlefs, and L. Paolasini for helpful discussions. This work was supported by the DFG through the SFB 1143, as well as Grants No. GE 1647/2-1 (S.P, J.G.) and No. HA6470/1-1 (J.E.H.B). Further financial support was received by the Ministry of Education and Science of the Russian Federation in the framework of the Increase Competitiveness Program of NUST "MISiS" (Grant No. kappa 2-2015-075) and by Act 211 of the Government of the Russian Federation (Contract No. 02.A03.21.0006). We also gratefully acknowledge the beamtime provision by BESSY II of the Helmholtz-Zentrum Berlin and the ESRF.
Предметные рубрики: EXCHANGE SCATTERING
POLARIZATION
MULTIFERROICS
REVERSAL
Аннотация: We present a resonant x-ray diffraction study of the magnetic order in NdFe3(BO3)4 and its coupling to applied electric fields. Our high-resolution measurements reveal two different coexisting magnetic phases, which can directly be controlled and manipulated by external electric fields. More specifically, the volume fraction of the collinear magnetic phase is found to strongly increase at the expense of helically ordered regions when an electric field is applied. These results confirm that the collinear magnetic phase is responsible for the ferroelectric polarization of NdFe3(BO3)4 and, more importantly, demonstrate that coexisting magnetic phases provide a route towards materials with a strong but yet hysteresis-free magnetoelectric response.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Kuzmenko A. M., Mukhin A. A., Ivanov V.Yu., Bezmaternykh L. N.
Заглавие : Coupled R and Fe magnetic excitations in RFe 3(BO 3) 4 multiferroics
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P.269-272. - ISBN 9783037854365, DOI 10.4028/www.scientific.net/SSP.190.269
Ключевые слова (''Своб.индексиров.''): magnetic resonance--rare-earth iron borates--terahertz spectroscopy--antiferromagnetics--coupled mode--exchange coupled--frequency ranges--g factors--iron borate--magnetic excitations--multiferroics--resonance mode--strong interaction--transmission spectrums--antiferromagnetism--electron transitions--gadolinium--ions--magnetic materials--magnetic permeability--magnetic resonance--terahertz spectroscopy--neodymium
Аннотация: Various resonance modes were observed in the transmission spectra of rare-earth iron borates RFe 3(BO 3) 4 (R = Nd 3+, Sm 3+, Gd 3+) at the frequency range 100-600 GHz, which were attributed to collective magnetic excitations in the exchange coupled Fe- and R-subsystems, i.e. antiferromagnetic (Fe) resonance and electron transitions in the R-ions. Strong interaction of the Fe and R oscillations was revealed and theoretically analyzed taking into account feature of the R-ion ground state. Intensities of the coupled modes (contributions to magnetic permeability) strongly depend on a difference of Fe and R ions g-factors that allows defining the sign of the latter. In particular, an appreciable intensity of exchange (Nd) modes in NdFe 3(BO 3) 4 is caused by g Nd?,|| < 0 whereas in GdFe 3(BO 3) 4 with gGd ? gFe ? 2 the exchange (Gd) modes were hided due to compensation of Fe and Gd contributions. In SmFe 3(BO 3) 4, despite a negligible Sm g-factor, the Sm modes were clear observed due to their excitation via coupling with the Fe-subsystem. В© (2012) Trans Tech Publications.
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Magnetic properties of Nd 0.6Dy 0.4Fe 3(BO 3) 4
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P.261-264. - ISBN 9783037854365, DOI 10.4028/www.scientific.net/SSP.190.261
Ключевые слова (''Своб.индексиров.''): multiferroics--phase transitions--rare-earth ferroborates rfe 3(bo 3) 4--experimental data--magnetization curves--molecular field approximation--multiferroics--rare-earth ferroborates rfe--spin reorientation transitions--spin-flop transitions--substituted compounds--magnetic materials--magnetic properties--neodymium--phase transitions--dysprosium compounds
Аннотация: The magnetic properties of trigonal Nd 0.6Dy 0.4Fe 3(BO 3) 4 substituted compound with the competitive Nd-Fe and Dy-Fe exchange interactions have been investigated. It has been shown that in Nd 0.6Dy 0.4Fe 3(BO 3) 4a spontaneous spin-reorientation transition from an ease-axis state to an easy-plane occurs near 31 K. Anomalies of the magnetization curves are observed in a spin-flop transition induced by the magnetic field B||c. The calculations were performed using a molecularfield approximation and a crystal-field model for the rare-earth subsystem. Extensive experimental data on the magnetic properties of Nd 0.6Dy 0.4Fe 3(BO 3) 4have been interpreted and good agreement between theory and experiment has been achieved using the obtained theoretical dependences. В© (2012) Trans Tech Publications.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Demidov A. A., Gudim, I. A., Eremin E. V.
Заглавие : Magnetic properties of Nd0.9Dy0.1Fe3(BO3)4
Место публикации : Physica B: Elsevier Science BV, 2012. - Vol. 407, Is. 3. - P.393-397. - ISSN 0921-4526, DOI 10.1016/j.physb.2011.11.004
Примечания : Cited References: 18. - This study was supported, in part, by Russian Federation's President Grant MK-497.2010.2 (A.A.D.).
Предметные рубрики: NDFE3(BO3)4
HOFE3(BO3)4
MULTIFERROICS
Ключевые слова (''Своб.индексиров.''): phase transitions--rare-earth ferroborates rfe3(bo3) 4--multiferroics
Аннотация: The magnetic properties of trigonal Nd0.9Dy0.1Fe3(BO3)4 substituted compound with the competitive Nd–Fe and Dy–Fe exchange interactions have been investigated. It has been shown that in Nd0.9Dy0.1Fe3(BO3)4 a spontaneous spin-reorientation transition from an ease-axis state to an easy-plane occurs near 8 K. Anomalies of the magnetization curves are observed in a spin-flop transition induced by the magnetic field B II c. The calculations were performed using a molecular-field approximation and a crystal-field model for the rare-earth subsystem. Extensive experimental data on the magnetic properties of Nd0.9Dy0.1Fe3(BO3)4 have been interpreted and good agreement between theory and experiment has been achieved using the obtained theoretical dependences.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Freydman A. L., Horoshiy I. N., Kolkov M. I., Terent'ev K. Yu.
Заглавие : Direct and inverse magnetoelectric effect in orthorhombic single crystals of Dy1−xHoxMnO3
Место публикации : Phys. Solid State. - 2022. - Vol. 64, Is. 14. - P.2347-2352. - ISSN 10637834 (ISSN), DOI 10.21883/PSS.2022.14.54338.185. - ISSN 10906460 (eISSN)
Примечания : Cited References: 17. - The study was done with financial support from the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and the Krasnoyarsk Regional Fund of Science within the scientific project No. 20-42-243008
Аннотация: In this work, the magnetoelectric response in a series of Dy1−xHoxMnO3 crystals with substitution x from 0 to 0.4 was investigated. The measurement results showed that, as x increases, a decrease in both the polarization Pa and the magnitude of the susceptibility of the inverse magnetoelectric effect αba is observed. In addition, the field Hb increases, at which the Pc → Pa transition is observed, and the temperature range of the existence of the magnetoelectric response decreases. Thus, an increase in the substitution x suppresses the magnetoelectric effect in this series of compounds. The measurement results also indirectly indicate the prolongation of the Pa state and, consequently, of the magnetic state with a cycloid lying in the ab-plane by an external electric field Ea.
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15.

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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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Mukhin A. A., Ivanov V. Yu., Tikhanovskii A. Yu., Gudim I. A.
Заглавие : Effect of electric field on magnetization and magnetic susceptibility in rare-earth ferroborite multiferroics
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст.K.O8. - P.312-313. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: 3. - This work was supported by the Russian Science Foundation (project 16-12-10531)
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuz'menko A. M., Mukhin A. A., Ivanov V. Y., Kadomtseva A. M., Bezmaternykh L. N.
Заглавие : Effects of the Interaction between R and Fe Modes of the Magnetic Resonance in RFe3(BO3)(4) Rare-Earth Iron Borates
Разночтения заглавия :авие SCOPUS: Effects of the interaction between R and Fe modes of the magnetic resonance in RFe 3(BO 3) 4 rare-earth iron borates
Место публикации : JETP Letters. - 2011. - Vol. 94, Is. 4. - P.294-300. - ISSN 0021-3640, DOI 10.1134/S0021364011160119
Примечания : Cited References: 27. - We are grateful to A. S. Prokhorov for discussion of this work and valuable comments. This work was supported by the Russian Foundation for Basic Research, project nos. 10-02-00846 and 09-02-01355, and the Ministry of Education and Science of the Russian Federation, project no. 16.518.11.7034.
Предметные рубрики: MULTIFERROICS
GDFE3(BO3)(4)
FERROELECTRICITY
Аннотация: Resonance modes that are due to magnetic excitations in the exchange-coupled subsystems of rare-earth ions (R = Nd3+, Sm3+, and Gd3+) and Fe3+ ions have been detected in submillimeter transmission spectra (0.1-0.6 THz) of RFe3(BO3)(4) iron borate-multiferroic single crystals. The strong interaction between spin oscillations of the Fe and R subsystems has been revealed, which determines the behavior of the modes depending on the anisotropy of the exchange splitting of the ground doublet of the R ion. It has been shown that the intensities of coupled modes (contributions to the magnetic permeability) depend strongly on the difference between the g factors of Fe and R ions. This dependence makes it possible to determine the sign of the latter g factor. In particular, a noticeable intensity of exchange Nd modes in NdFe3(BO3)(4) is due to an increase in their contribution at g(perpendicular to,parallel to)(Nd) 0, while in GdFe3(BO3)(4) with g(Gd) approximate to g(Fe) approximate to 2, the Fe and Gd contributions compensate each other and the exchange (Gd) mode is not observed. In spite of the weak interaction of Sm ions with the magnetic field, SmFe3(BO3)(4) exhibits resonance modes, which are attributed to the excitation of Sm ions through the Fe subsystem. DOI: 10.1134/S0021364011160119
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bilych, I., V, Kolodyazhnaya M. P., Zhekov K. R., Zvyagina G. A., Fil V. D., Gudim I. A.
Заглавие : Elastic, magnetoelastic, magnetopiezoelectric, and magnetodielectric characteristics of HoAl3(BO3)4
Место публикации : Low Temp. Phys. - 2020. - Vol. 46, Is. 9. - P.923-931. - ISSN 1063-777X, DOI 10.1063/10.0001715. - ISSN 1090-6517(eISSN)
Примечания : Cited References: 23
Аннотация: The main elastic moduli and piezoelectric modulus have been measured in holmium alumoborate single crystals. The renormalization of the permittivity, piezoresponse, and sound velocities, driven by the nematic-like paramagnetic phase in the sample, is considered. A significant variability of the results is detected, which is caused, presumably, by the fact that, under the action of external fields, the motion trajectory of the nematic-like phase’s director depends on random defects of thermoelastic origin. It is shown that above 5 K, the temperature dependences of the studied parameters are well-described using holmium ion’s known ground multiplet spectrum, formed by the interaction with the crystal field. Changes in the C44-mode velocity in the sub-Kelvin temperature range are measured.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Turchin P. P., Burkov S. I., Turchin V. I., Yurkevich S. V., Sukhodaev P. O., Raikova I. S.
Заглавие : Electromechanical Properties and Anisotropy of Acoustic Waves Characteristics in Single Crystals YAl3(BO3)4
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2019. - Vol. 12, Is. 6. - P.756-771. - ISSN 1997-1397, DOI 10.17516/1997-1397-2019-12-6-756-771; Журн. СФУ. Матем. и физика. - ISSN 2313-6022 (eISSN)
Примечания : Cited References: 29
Аннотация: Velocity of bulk acoustic waves in base and rotated cuts have been measured by the ultrasonic pulse-echo method and values of CE ijkl and eijk in single crystals YAl3(BO3)4 have been calculated. The value of dijk piezoelectric modulus of these single crystals have been determined by quasistatic measurements, and εσ ij dielectric constants have been determined by the flat capacitor method. Experimental values of material constants have been applied for the study of anisotropy of acoustic waves characteristics in single crystals YAl3(BO3)4.Эхо-импульсным ультразвуковым методом измерены скорости объемных акустических волн в базовых и повернутых срезах и рассчитаны значения CE ijkl и eijk в монокристаллах YAl3(BO3)4. Величины пьезомодулей dijk этих монокристаллов определены квазистатическими измерениями, диэлектрических постоянных εσij — методом плоского конденсатора. Экспериментальные значения материальных постоянных применены для исследования анизотропии характеристик акустических волн в монокристаллах YAl3(BO3)4.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Kretinin V. V., Panasevich A. M., Yanushkevich K. I.
Заглавие : Enhancement of the magnetocapacitance effect in an external electric field in LaxBi1-xFeO3 films
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 121, Is. 3. - P.422-428. - ISSN 1063-7761, DOI 10.1134/S1063776115090022
Примечания : Cited References: 28. - This work was supported by the Russian Foundation for Basic Research (project no. 12-02-00125-a) and by the State Task no. 114090470016.
Предметные рубрики: MAGNETIC DOMAIN-WALLS
BIFEO3 FILMS
MULTIFERROICS
Аннотация: The goal of the study is to determine the value of magnetocapacitance under the substitution of lanthanum for bismuth in thin LaxBi1-xFeO3 films and to find out the effect of an external bias electric field on the magnetocapacitance effect. To solve this task, the dielectric permittivity, the magnetic permeability, and the loss tangent are measured in LaxBi1-xFeO3 films in magnetic fields of up to 8 kOe in the range of temperatures 100 K < T < 1000 K. Maxima of the permittivity and permeability at low temperatures and the dependence of the permeability on the prehistory of a sample are found. An increase in the magnetocapacitance due to the substitution of lanthanum for bismuth is observed. A giant enhancement of magnetocapacitance in an external electric bias field is revealed. These phenomena are attributed to the rearrangement of the domain structure. © 2015, Pleiades Publishing, Inc.
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