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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) : 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) : Ivanov Y. N., Sukhovskii A. A., Volkov N. V.
Заглавие : B-11 NMR study of Ho1−x Y x Al3(BO3)4 multiferroics
Место публикации : J. Struct. Chem. - 2013. - Vol. 54, Is. 1: Suppl. - P.130-136. - DOI 10.1134/S0022476613070135
Аннотация: The 11B NMR method is used to study the crystals of trigonal alumina borates Ho1−x Y x Al3(BO3)4 (x = 0, 0.5, 1). The temperature-field evolution of quadrupole and hyperfine interactions in these compounds is studied and described.
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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) : 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) : 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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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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrova A. E., Pankrats A. I.
Заглавие : Copper metaborate CuB2O4 phase diagrams bAsed on the results of measuring the magnetic moment
Место публикации : J. Exp. Theor. Phys. - 2018. - Vol. 126, Is. 4. - P.506-513. - ISSN 10637761 (ISSN), DOI 10.1134/S1063776118030172
Примечания : Cited References: 18. - This work was supported in part by the Russian Foundation for Basic Research (project no. 18-02-00183-a) and the program “Condensed Matter Physics and New-Generation Materials” of the Presidium of the Russian Academy of Sciences.
Ключевые слова (''Своб.индексиров.''): copper metaborate--magnetic phase transitions--multiferroics
Аннотация: The magnetic phase transitions and the phase diagrams of the CuB2O4 multiferroic are studied. Phase diagrams of copper metaborate in a magnetic field directed along the [100] and [001] axes are plotted using the results of measuring the magnetic moment. Evidences for the existence of polycritical points are obtained.
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10.

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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