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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Freydman A. L., Popkov S. I., Semenov S. V., Turchin P. P.
Заглавие : A capacitive dilatometer for measuring the magnetostriction, piezoelectric effect, and lInear thermal-expansion coefficient
Коллективы : Russian Foundation for Basic Research; Government of Krasnoyarsk krai; Krasnoyarsk Krai Foundation for Support of Scientific and R D Activities [16-48-243040]; Russian Foundation for Basic Research [16-3800245]
Место публикации : Tech. Phys. Lett. - 2018. - Vol. 44, Is. 2. - P.123-125. - ISSN 1063-7850, DOI 10.1134/S1063785018020074. - ISSN 1090-6533(eISSN)
Примечания : Cited References:11. - This study was supported by the Russian Foundation for Basic Research, the Government of Krasnoyarsk krai, the Krasnoyarsk Krai Foundation for Support of Scientific and R& D Activities (project no. 16-48-243040) and the Russian Foundation for Basic Research (project no. 16-3800245).
Аннотация: We describe a capacitive dilatometer for measuring the magnetostriction, piezoelectric effect, and linear thermal-expansion coefficient in the temperature range from 1.85 to 350 K in external magnetic fields of up to 90 kOe under a voltage of 1 kV, which operates on the basis of a Quantum Design PPMS commercial facility for studying the properties of solids.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev A. D., Freydman A. L.
Заглавие : Implementation of the Astrov method for measuring the ME E effect with the use of a vibrating-coil magnetometer
Место публикации : J. Surf. Invest.: Pleiades Publishing, 2014. - Vol. 8, Is. 1. - P.17-19. - ISSN 1027-4510, DOI 10.1134/S1027451014010078. - ISSN 1819-7094
Примечания : Cited References: 12
Предметные рубрики: Surfaces and Interfaces, Thin Films
Ключевые слова (''Своб.индексиров.''): ac voltage--external fields--magnetization hysteresis--repolarization--temperature dependence
Аннотация: A setup is developed for measuring the ME E effect by fixing the amplitude of magnetization oscillations upon the repolarization of a sample, caused by the application of ac voltage to the sample plates. The temperature dependence of the ME E effect in a Ga2 - xFexO3 single-crystal sample is measured in external fields from 0.25 to 1 kOe at temperatures from 77.4 to 280 K. It is established that the effect disappears when the Curie temperature is attained. The hysteresis of the magnetoelectric effect related to the magnetization hysteresis is measured. © 2014 Pleiades Publishing, Ltd.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Freydman A. L., Popkov S. I., Krasikov A. A., Mikhashenok N. V.
Заглавие : Capacitance dilatometer for small deformations measurements caused by external magnetic and electric fields and temperature
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow International Symposium on Magnetism (MISM-2017): 1-7 July 2017 : book of abstracts. - 2017. - Ст.5PO-I2-2. - P.1047 (Шифр 29916280)
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Freydman A. L., Balaev A. D., Dubrovskiy A. A., Temerov V. L., Gudim, I. A.
Заглавие : Comparative study of magnetoelectric effect in HoAl3(BO3)4 and HoGa3(BO3)4 single crystals
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow International Symposium on Magnetism (MISM-2017): 1-7 July 2017 : book of abstracts. - 2017. - Ст.5PO-I2-5. - P.1050 (Шифр 29916280)
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pankrats A. I., Kolkov M. I., Balaev A. D., Freydman A. L., Vasiliev A. D., Balaev D. A.
Заглавие : Comparative study of the magnetic phase diagrams and spin-flop-driven magnetodielectric responses of the pure and Mn3+-doped Pb2Fe2Ge2O9 single crystals
Место публикации : J. Magn. Magn. Mater. - 2021. - Vol. 534. - Ст.168023. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2021.168023
Примечания : Cited References: 21. - This study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 18-42-240008 “Effect of the Magnetic Structure on the Magnetodielectric Properties of Oxide Crystals Containing Stereoactive Pb 2+ and Bi 3+ Ions”
Аннотация: The Pb2Fe2-xMnxGe2O9 (x = 0.43) orthorhombic antiferromagnet single crystals have been synthesized by a modified pseudo-flux technique and their magnetic and magnetodielectric properties have been investigated. It has been established that partial substitution of highly anisotropic Mn3+ ions for iron ones significantly affects the magnetic structure of the crystal. Under magnetization of the crystal along the rhombic b and c axes, magnetization jumps have been detected, which are indicative of the occurrence of orientational transitions identified as first-order ones. No weak ferromagnetism characteristic of the pure crystal in the rhombic a axis direction has been detected. The field dependences of the magnetization for the pure and Mn-doped crystals have been analyzed using the thermodynamic potential that takes into account the crystal symmetry. It has been shown that, in the Mn-substituted crystal, the antiferromagnetic vector in the ground state is parallel to the rhombic b axis; in this state, weak ferromagnetism has not been observed. Under magnetization along the b axis, a conventional spin-flop transition occurs. The orientational transition under magnetization along the c axis has been attributed to the reorientation of the antiferromagnetic vector relative to the a axis with the simultaneous occurrence of a weak ferromagnetic moment along the c axis. Magnetic phase diagrams of the Mn-doped crystal for the magnetic fields H||b and H||c have been built. In the Mn-doped crystal, at E||c and H||c, the orientational transition-induced magnetodielectric response jump has been detected, which is higher than the jumps observed for the undoped crystal by a factor of 3. The magnetodielectric properties of the pure and Mn-doped crystals have been analyzed using their magnetic phase diagrams.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Freydman A. L., Dubrovskii A. A., Temerov V. L., Gudim I. A.
Заглавие : Comparative study of the magnetoelectric effect in HoAl3(BO3)4 and HoGa3(BO3)4 single crystals
Коллективы : Russian Foundation for Basic Research [16-38-00245, 16-32-00163]; Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory; Krasnoyarsk Territorial Foundation [16-48-243040]
Место публикации : Phys. Solid State. - 2018. - Vol. 60, Is. 3. - P.510-514. - ISSN 1063-7834, DOI 10.1134/S1063783418030113. - ISSN 1090-6460(eISSN)
Примечания : Cited References:13. - This study was supported by the Russian Foundation for Basic Research, projects nos. 16-38-00245 and 16-32-00163 and the Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory, and Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 16-48-243040.
Предметные рубрики: MAGNETIZATION
Аннотация: The comparative study of the magnetoelectric properties and magnetostriction of HoGa3(BO3)4 and HoAl3(BO3)4 single crystals has been carried out. The investigated compounds exhibit qualitatively similar magnetodielectric and inverse magnetoelectric ME E effects with the close absolute values, which is indicative of the weak effect of a nonmagnetic metal ion. On the contrary, the magnetostriction of the galloborate has been found to be threefold higher than that of the alumoborate. In addition, the difference between the qualitative behaviors of magnetostriction has been established: the magnetic-field dependence of magnetostriction for the alumoborate has the maximum near 70 kOe at T = 4.2 K, while the galloborate magnetostriction has no maximum and does not saturate in a field of 140 kOe.
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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 сборника (однотомник)
Шифр издания :
Автор(ы) : Gokhfel'd D. M., Semenov S. V., Balaev D. A., Dubrovskiy A. A., Terent'yev K. Yu., Freydman A. L., Krasikov A. A., Petrov M. I.
Заглавие : Control of peak effect in YBCO by Nd substitution
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.O2.7. - P.140. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 4. - The work was supported by Russian Foundation for Basic Research Grant No.16-38-00400
Ключевые слова (''Своб.индексиров.''): peak effect--paramagnetic magnetization--bulk superconductors--critical current--irreversibility field
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Freydman A. L., Eremin E. V., Pogoreltcev E. I., Velikanov D. A.
Заглавие : Dielectric and magnetic anomalies in α-MnS single crystals at applied magnetic fIelds
Место публикации : J. Supercond. Nov. Magn. - 2022. - Vol. 35, Is. 1. - P.277-281. - ISSN 1557-1939, DOI 10.1007/s10948-021-06045-z. - ISSN 1557-1947(eISSN)
Примечания : Cited References: 22
Предметные рубрики: MAGNETOSTRICTION
ANISOTROPY
Аннотация: Temperature and magnetic field dependences of the magnetic susceptibility and dielectric permittivity of the α-MnS single crystal with NaCl structure are first investigated at around Neel temperature and at 4.2 K and H up to 70 kOe. A relation between the investigated properties was established. The founded phenomena can be due to the magnetostriction or magnetoelastic mechanism and the spin-dependent dipole moment.
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10.

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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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Freydman A. L., Balaev A. D., Dubrovskiy A. A., Eremin E. V., Temerov V. L., Gudim, I. A.
Заглавие : Direct and inverse magnetoelectric effects in HoAl3(BO3)4 single crystal
Коллективы : Russian Foundation for Basic Research [13-02-12442ofi_m2, 14-02-00307]
Место публикации : J. Appl. Phys.: American Institute of Physics, 2014. - Vol. 115, Is. 17. - Ст.174103. - ISSN 0021-8979, DOI 10.1063/1.4874270. - ISSN 1089-7550
Примечания : Cited References: 34. - This work was supported by Russian Foundation for Basic Research (Project Nos. 13-02-12442ofi_m2 and 14-02-00307). The authors are grateful to V. N. Ilyushchenko for the help in preparing of this manuscript.
Предметные рубрики: POLARIZATION
BEHAVIOR
ORDER
Аннотация: The direct (MEH-) and inverse (MEE-) magnetoelectric effects in the HoAl3(BO3)4 single crystal are studied. Temperature and magnetic field dependences of permittivity of the crystal are investigated. A relation between the investigated effects was established. It was found that the magnetoelectric effect can exist in crystals without magnetic order or spontaneous polarization. It was shown that the phenomena investigated are due to magnetostriction or magnetoelastic effect. The thermodynamic potential was considered for describing magnetoelectric effect at low magnetic fields. The results obtained are explained within a proposed qualitative microscopic model, based on interplay of configuration of 4f- electron subshell of the rare-earth element and applied magnetic or electric field.Изучаются прямой (MEH-) и обратный (МЭА-) магнитоэлектрические эффекты в монокристалле HoAl3(BO3)4 . Зависимости диэлектрической проницаемости кристалла от температуры и магнитного поля исследованы. Была создана связь между исследованными эффектами. Было обнаружено, что магнитоэлектрический эффект может существовать в кристаллах без магнитного порядка или спонтанной поляризации. Было показано, что исследуемые явления происходят из-за магнитострикции или магнитоупругого эффекта. Термодинамический потенциал рассчитывался для описания магнитоэлектрический эффект в слабых магнитных полях. Полученные результаты объясняются в рамках предложенной качественной микроскопической модели, основанной на взаимодействии конфигурации 4f-электронов в подоболочке редкоземельного элемента и внешнего магнитного или электрического поля.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Freydman A. L., Balaev A. D., Dubrovskii A. A., Eremin E. V., Shaikhutdinov K. A., Temerov V. L., Gudim, I. A.
Заглавие : Effect of an electric field on the magnetization of a SmFe3(BO3)4 single crystal
Коллективы : Russian Foundation for Basic Research [14-02-00307_a]
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 57, Is. 7. - P.1357-1361. - ISSN 1063, DOI 10.1134/S1063783415070112. - ISSN 10906460(eISSN)
Примечания : Cited References:8. - This study was supported by the Russian Foundation for Basic Research (project no. 14-02-00307_a).
Аннотация: A change in the magnetization of a SmFe3(BO3)4 single crystal in response to an applied alternating electric field has been experimentally observed for the first time. The measurements have demonstrated that the magnetization oscillates not only at a frequency of the applied electric field but also at twice the frequency. The dependences of the magnetoelectric effect on the magnetic and electric fields and temperature have been measured. It has been assumed that the existence of the second harmonic of the magnetoelectric effect is due to the electrostriction.
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Eremin E. V., Freydman A. L., Gudim I. A.
Заглавие : Direct and revers magnetoelectric effect in NdFe3(BO3)4
Коллективы : Российская академия наук, Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН, Казанский (Приволжский) федеральный университет, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022): Book of abstracts/ program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. K: Magnetic semiconductors, multiferroics, topological insulators. - Ст.K.P3. - P.312. - ISBN 978-5-94469-051-7
Примечания : Support by RSF №22-1220019 is acknowledged
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gokhfeld D. M., Semenov S. V., Balaev D. A., Yakimov I. S., Dubrovskiy A. A., Terentyev K. Yu., Freydman A. L., Krasikov A. A., Petrov M. I.
Заглавие : Establishing of peak effect in YBCO by Nd substitution
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН , Russian Foundation for Basic Research [16-38-00400]
Место публикации : J. Magn. Magn. Mater.: Elsevier Science, 2017. - Vol. 440. - P.127-128. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2016.12.089. - ISSN 1873-4766(eISSN)
Примечания : Cited References:10. - The work was supported by Russian Foundation for Basic Research Grant No. 16-38-00400.
Предметные рубрики: SUPERCONDUCTORS
Ключевые слова (''Своб.индексиров.''): peak effect--magnetization--bulk superconductors--critical current--ybco--nd3+
Аннотация: Y0.75Nd0.25Ba2Cu3O7−d superconductor has the peak effect with pronounced fishtail feature on magnetization hysteresis. The magnetic field of the peak effect maximum is in ~4 times higher than one of NdBa2Cu3O7−d. The magnetization hysteresis is tilted anticlockwise due to paramagnetic Nd3+ ions occurred on the surface of grains and in the vortex cores.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Sablina K. A., Freydman A. L., Krasikov A. A., Bovina A. F.
Заглавие : Interrelation of anisotropy of magnetic properties and magnetodielectric effect in a Cu3B2O6 single crystal
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 58, Is. 2. - P.284-286. - ISSN 10637834 (ISSN), DOI 10.1134/S1063783416020062
Примечания : Cited References: 15
Предметные рубрики: Dielectric-properties
Spin system
Multiferroics
Аннотация: The effect of an external magnetic field on permittivity has been studied in a Cu3B2O6 single crystal with a layered structure in the direction perpendicular to layers (bc-planes). It has been found that the appreciable magnetodielectric effect in the temperature range below the Neel temperature (?10 K) takes place only at one magnetic field orientation H and one crystallographic direction, i.e., H || b. Such “selectivity” of the magnetodielectric effect correlates with the anisotropic behavior of magnetic properties of the crystal. © 2016, Pleiades Publishing, Ltd.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Freidman A. L., Semenov S. V., Kolkov M. I., Terent'ev K. Yu., Pavlovskiy N. S., Gokhfeld D. M., Shaykhutdinov K. A., Balaev D. A.
Заглавие : Inverse and direct magnetoelectric effects in orthorhombic DyMnO3 manganite single crystals
Коллективы : Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-243024]
Место публикации : J. Appl. Phys. - 2020. - Vol. 128, Is. 9. - Ст.094102. - ISSN 0021-8979, DOI 10.1063/5.0006595. - ISSN 1089-7550(eISSN)
Примечания : Cited References: 27. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project "Research, synthesis and investigation of new oxide single crystals showing the interrelation of magnetic, magnetoelastic and magnetoelectric properties" (Project No. 18-42-243024). The measurements were performed in part on the equipment at the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences
Аннотация: Correlations between the direct and inverse magnetoelectric effects in orthorhombic DyMnO3 single crystals have been investigated. In the inverse magnetoelectric effect, the magnetic moment of the crystal appears to have a contribution that is sinusoidal oscillating in ac electric fields below the temperature TFE of ferroelectric phase transition. The first and the second harmonics of the inverse magnetoelectric effect are clearly detected. The magnetoelectric susceptibilities α and β, corresponding to first and second harmonics, are found to correlate with the derivative of polarization with respect to the magnetic field. The influence of the magnetic and electric regimes during cooling on magnetoelectric effects has also been studied. The maximum change in the magnetic moment of a sample under the action of electric fields is observed under the same (T, H) conditions as the rotation of the spontaneous polarization vector from the crystallographic c direction to the a axis in the magnetic field H || b.
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Eremin E. V., Dubrovskiy A. A., Freydman A. L., Gudim, I. A.
Заглавие : Investigation of the magnetoelectric and magnetoelastic properties of HoFe3-xGax(BO3)4 single crystals
Коллективы : Novel Trends in Physics of Ferroics, International Workshop , "Новые направления в развитии физики ферроиков", международный семинар, Физико-технический институт им. А.Ф. Иоффе РАН
Место публикации : Second Int. Workshop "Novel Trends in Physics of Ferroics": abstracts. - 2017. - P.49
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18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Dubrovskiy A. A., Freydman A. L., Balaev A. D., Eremin E. V., Gudim, I. A., Temerov V. L.
Заглавие : Investigation of the magnetoelectric and magnetoelasticproperties of oxiborates khantite-type single crystals
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow International Symposium on Magnetism (MISM-2017): 1-7 July 2017 : book of abstracts. - 2017. - Ст.4OR-F-10. - P.665 (Шифр 29916280)
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pankrats A. I., Balaev D. A., Nikitin S. E., Freydman A. L., Krasikov A. A., Balaev A. D., Popkov S. I., Kolkov M. I.
Заглавие : Magnetic and thermodynamic properties and spin-flop-driven magnetodielectric response of the antiferromagnetic Pb2Fe2Ge2O9 single crystals
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.O3. - P.301-302. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: 4. - The study was funded by RFBR and the Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, to the research project no. 18-42-240008 ”Effect of magnetic structure on the magnetodielectric properties of oxide crystals containing stereoactive ions Pb2+ and Bi3+”
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pankrats A. I., Balaev D. A., Nikitin S. E., Freydman A. L., Krasikov A. A., Balaev A. D., Popkov S. I., Kolkov M. I.
Заглавие : Magnetic and thermodynamic properties and spin-flop-driven magnetodielectric response of the antiferromagnetic Pb2Fe2Ge2O9 single crystals
Коллективы : Russian Foundation for Basic Research [16-02-00563]; RFBR; Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-240008]; International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM)
Место публикации : J. Magn. Magn. Mater. - 2019. - Vol. 479. - P.114-120. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2019.02.026. - ISSN 1873-4766(eISSN)
Примечания : Cited References: 23. - This study was supported by the Russian Foundation for Basic Research, project no. 16-02-00563; the reported study was also funded by RFBR and the Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, to the research project no. 18-42-240008 "Effect of magnetic structure on the magnetodielectric properties of oxide crystals containing stereoactive ions Pb2+ and Bi3+". S.E.N. acknowledges the support of the International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM).
Предметные рубрики: FERROMAGNETISM
TRANSITION
Аннотация: Orthorhombic Pb2Fe2Ge2O9 antiferromagnetic single crystals have been synthesized by a modified pseudo-flux technique and their magnetic, thermodynamic, and magnetodielectric properties have been investigated. It has been found that, below the Ned temperature (45.2 K), iron moments are arranged in a canted antiferromagnetic structure with a weak ferromagnetic moment parallel to the a axis. According to the specific heat measurement data, the T-N value remains invariable in applied magnetic fields of up to 50 kOe within the experimental accuracy. The magnetic entropy in the investigated crystals attains 2Rln(2S + 1) right above T-N, which is indicative of a purely magnetic nature of the transition. It has been shown that the weak ferromagnetic moment is induced by the interplay between the single-ion anisotropy and antisymmetric Dzyaloshinskii-Moriya exchange interaction, with the latter contribution being dominant. It has been established from the angular dependences of the magnetization in three orthorhombic planes that the symmetries of the magnetic and crystal structure are identical. The magnetodielectric properties of the Pb2Fe2Ge2O9 single crystals have been studied at different mutual orientations of the electric and magnetic fields. The most prominent anomalies have been observed in the vicinity of the spin-flop transition in a magnetic field applied along the c axis.
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