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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Frolov K. V., Smirnova E. S., Sidorova E. V., Alekseeva O. A., Gudim I. A.
Заглавие : 57Fe Mossbauer spectroscopy study of SmFe3 – xAlx(BO3)4 (x = 0–0.28) multiferroics
Колич.характеристики :10 с
Место публикации : JETP Lett. - 2025. - Vol. 121, Is. 2. - P.132-141. - ISSN 00213640 (ISSN), DOI 10.1134/S0021364024604998. - ISSN 10906487 (eISSN)
Примечания : Cited References: 45. - This work was supported by the Russian Science Foundation (contract no. 23-22-00286)
Аннотация: SmFe3 – xAlx(BO3)4 multiferroic single crystals with x = 0–0.28 have been studied in the temperature range T = 3.8−298 K using 57Fe Mössbauer spectroscopy and X-ray diffraction analysis. An increase in the Mössbauer hyperfine quadrupole splitting with the content of aluminum x impurities has been found. For all studied samples, the Mössbauer Debye temperatures ΘM of iron ions have been determined in good agreement with the values for iron ions calculated from X-ray diffraction data. It has been shown that the low-temperature Mössbauer spectral lines of single crystals doped with Al in a magnetically ordered state are broadened compared to the corresponding lines of the undoped SmFe3(BO3)4 ferroborate; this broadening is best approximated within the multilevel spin relaxation model. The Néel temperatures TN of the magnetic phase transition have been determined for all studied SmFe3 – xAlx(BO3)4 samples. It has been (found that the Néel temperature TN decreases nonlinearly with an increase in the content x of aluminum, and the type of three-dimensional magnetic ordering changes from planar to Ising.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Golosovsky I. V., Mukhin A. A., Skumryev V., Ressouche E., Ivanov V. Yu., Gudim I. A.
Заглавие : Hidden magnetic instability in the substituted multiferroics (Nd, Tb)Fe3(BO3)4
Колич.характеристики :7 с
Место публикации : Phys. Rev. B. - 2024. - Vol. 109, Is. 1. - Ст.014421. - ISSN 24699950 (ISSN), DOI 10.1103/PhysRevB.109.014421. - ISSN 24699969 (eISSN)
Примечания : Cited References: 22. - The authors are grateful to Prof. B. Z. Malkin for fruitful discussions. I.V.G. acknowledges financial support from the Russian Foundation for Basic Research under Grant No. 20-02-00109. A.A.M. and V.Yu.I. acknowledge financial support of the magnetic studies and the developed model from the Russian Science Foundation under Project No. 22-42-05004
Аннотация: In the substituted Nd1–xTbxFe3(BO3)4 (x=0.1 and x=0.2), possessing almost easy-axis magnetic structure at low temperatures, an unusual two-step transition in fields along the trigonal c axis was observed by magnetization and single-crystal neutron diffraction studies. At the first step, only part of the Tb Ising-type moments flip to the c axis, which is accompanied by a significant deviation of the antiferromagnetic Fe spins from the c axis. At the second step, the remaining Tb moments flip and the Fe moments flop into the basal plane. The observed evolution is qualitatively explained by a model assuming small deviations of Tb moments from the trigonal axis due to local environment distortions, which leads to nonequivalence of the Tb ions with respect to effective Tb-Fe exchange and external field. Thus, an intrinsic “hidden” instability of the magnetic system in the magnetic field occurs.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Krylov A. S.
Заглавие : Phase transitions in multiferroics ferroborates with huntite structure
Коллективы : Уральский Федеральный университет им. Первого Президента России Б.Н. Ельцина, Ural Federal University, "Materials science and nanotechnology", International conference
Место публикации : Materials Science and Nanotechnology (MSN-2023): abstract book of International conference/ Ural Federal University; org. com. A. N. Vtyurin et al. - Ekaterinburg, 2023. - Ст.114. - P.25. - ISBN 978-5-9500624-6-9
Примечания : Cited References: 3. - RFBR funded the reported study according to the research project № 21-52-12018
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Matveeva A. N., Zobkalo I. A., Sazonov A., Freidman A. L., Semenov S. V., Kolkov M. I., Terentjev K. Yu., Pavlovskiy N. S., Shaykhutdinov K. A., Hutanu V.
Заглавие : Magnetic ordering and chirality in multiferroic Dy1-xHoxMnO3 (x = 0.2)
Место публикации : Phys. B: Condens. Matter. - 2023. - Vol. 658. - Ст.414821. - ISSN 09214526 (ISSN), DOI 10.1016/j.physb.2023.414821. - ISSN 18732135 (eISSN)
Примечания : Cited References: 41. - The authors are grateful to D.A. Balaev for fruitful discussions and crystal growth management. This work was supported by the Russian Foundation for Basic Research grant # 19-52-12047, and DFG grant # SA3688/1-1, 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 POLI operated jointly by RWTH Aachen University and Jülich Centre for Neutron Science within JARA cooperation
Аннотация: Effect of substitution Dy by Ho on the magneto-electric behavior of the compound Dy0.8Ho0.2MnO3 was investigated by the different methods of polarized and classical neutron diffraction and macroscopic methods. It is shown that substitution by Ho of 20% on the position of Dy do not change overall crystal symmetry of compound. It remains of Pbnm type down to the very low temperatures. Magnetic ordering, its temperature and field evolution was determined by the use of single crystal neutron diffraction and magnetization measurements. Chiral type of magnetic structure on Mn subsystem is confirmed below Tc ≈ 16 K. Using polarized neutron diffraction the 3-component character of rare earth magnetic ordering in Dy0.8Ho0.2MnO3 in contrast to DyMnO3 could be revealed. It was shown that doping by 20% Ho suppresses the spontaneous rare-earth ordering with its own propagation vector and provides the situation when two magnetic subsystems, manganese and rare earth ones have a coherent incommensurate spatial propagation. The influence of the external electric field on the magnetic chirality could be directly evidenced, proving strong magneto-electric coupling in multiferroic phase. The study of the electric polarization under similar temperatures and fields on the same samples provides the direct correlation between the results of the microscopic and macroscopic investigations.
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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) : 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) : Eremin E. V., Gudim I. A., Titova V. R.
Заглавие : Effect of uncontrolled impurities on the magnetic state of ferroborates GdFe3(BO3)4
Колич.характеристики :5 с
Место публикации : Phys. Solid State. - 2023. - Vol. 65, Is. 11. - P.1844-1848. - ISSN 10637834 (ISSN), DOI 10.61011/PSS.2023.11.57316.226. - ISSN 10906460 (eISSN)
Примечания : Cited References: 15. - This study was supported by grant No. 22-12-20019 provided by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation
Аннотация: A comparative analysis of magnetic properties of gadolinium ferroborates GdFe3(BO3)4 grown from three different solvents: lithium tungstate [GdFe3(BO3)4], trimolybdate-bismuth [GdFe3(BO3)4 : Bi] and potassium-molybdate [GdFe3(BO3)4 : Mo] melt solutions has been carried out. Phase diagrams of the magnetic state "temperature - magnetic field" of the investigated crystals have been constructed. It is shown that GdFe3(BO3)4 does not contain uncontrolled impurities, whereas for GdFe3(BO3)4 : Bi the incorporation of uncontrolled Bi3+ impurities in small amounts (~ 6 at.%) is confirmed. For GdFe3(BO3)4 : Mo, it was assumed that both Mo ions (of valence higher than 3+) and potassium ions K+ are present as uncontrolled impurities.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzmenko A. M., Ivanov V. Yu., Tikhanovsky A. Yu., Pimenov A. G., Shuvaev A. M., Gudim I. A., Mukhin A. A.
Заглавие : Terahertz spectroscopy of magnetoelectric HoAl3(BO3)4
Колич.характеристики :6 с
Место публикации : Opt. Spectrosc. - 2023. - Vol. 131, Is. 6. - P.409-414. - ISSN 0030400X (ISSN), DOI 10.1134/S0030400X23020121. - ISSN 15626911 (eISSN)
Примечания : Cited References: 18. - This study was partially financially supported by the Russian Science Foundation (project 16-12-10531)
Аннотация: Experimental and theoretical study of submillimeter (terahertz) spectroscopic and magnetic properties of the rare-earth aluminum borate HoAl3(BO3)4 were performed at temperatures 3–300K. In the transmittance spectra a number of resonance lines were detected at frequencies 2–35 cm–1 for different radiation polarizations. These modes were identified as transitions between the lower levels of the ground multiplet of the Ho3+ ion split by the crystal field, including both transitions from the ground state to the excited ones and transitions between the excited states. The established excitation conditions of the observed modes and the simulation of the spectra made it possible to separate the magnetic and electric dipole transitions and to determine the energies of the corresponding states, their symmetry, and the matrix elements of the transitions. Low-frequency lines that do not fit into the established picture of the electron states of Ho3+ were also found; these lines, apparently, correspond to the ions with the distorted by defects local symmetry of the crystal field.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krylov A. S., Krylova S. N., Gudim I. A., Kitaev Y., Golovkina E., Zhang H., Vtyurin A. N.
Заглавие : Pressure–temperature phase diagram of multiferroic TbFe2.46Ga0.54(BO3)4
Место публикации : Magnetochemistry. - 2022. - Vol. 8, Is. 6. - Ст.59. - ISSN 23127481 (ISSN), DOI 10.3390/magnetochemistry8060059
Примечания : Cited References: 48. - The research of Krylov A. and Gudim I. was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-42-240009. This work of Vtyurin A., Krylova S. was financially supported by the Russian Foundation for Basic Research and DFG (Deutsche Forschungsgemeinschaft) project number No 21-52-12018. The experiments were performed in the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS”
Аннотация: The pressure–temperature phase diagram of the multiferroic TbFe2.46Ga0.54(BO3)4 was studied for hydrostatic pressures up to 7 GPa and simultaneously with temperatures up to 400 K by the Raman spectroscopy technique. The structural phase transition from the R32 phase to the P3121 phase was determined by observing the condensation of soft modes and the appearance of new lines. An increase in pressure leads to an increase in the temperature of the structural phase transition. These phases are stable over the entire investigated temperature and pressure range. No other phases have been found.
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10.

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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