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1.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Patrin K. G., Volkov N. V., Petrakovskii G. A., Boni P., Clementyev E., Sablina K. A., Eremin E. V., Vasilev V., Vasiliev A. D., Molokeev M. S.
Заглавие
: (La0.4Eu0.6)0.7Pb0.3MnO3 single crystal: magnetic and transport properties; electron magnetic
resonance
measurements
Коллективы
: "New Layered 3d-Materials for Spintronics", Workshop INTAS - Siberian Branch of the Russian Academy of Sciences Scientific Cooperation on the Research Project
Место публикации
: Workshop INTAS - Sib. Branch of the RAS Sci. Cooperation on the Res. Project “New Layered 3d-Materials for Spintronics”/ chairman G. A. Petrakovskii. - 2007. - P.15
Аннотация:
INTAS (The International Association for the Promotion of Cooperation with Scientists from the New Independent States of the Former Soviet Union) — международная ассоциация по содействию сотрудничеству с учёными новых независимых государств бывшего Советского Союза. Некоммерческая организация, финансировалась главным образом из бюджета Европейского Союза. Являлась крупнейшим фондом, поддерживающим научное сотрудничество между учёными стран бывшего СССР и Европейского Союза с 1993 г. Программы INTAS охватывали широкий круг научно-исследовательских проблем. 22 сентября 2006 года было принято решение о прекращении осуществления программы на основании рекомендации Европейской Комиссии. С 1 апреля 2007 года прекратилось распределение новых грантов.
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2.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Arkhipkin V. G.
Заглавие
: 2-photon-
resonance
and 3-photon-
resonance
displacement of frequencies and interference of quantum transitions
Место публикации
: Zhurnal Eksperimentalnoi Teor. Fiz.: MEZHDUNARODNAYA KNIGA, 1995. - Vol. 108, Is. 1. - P.45-52. - ISSN 0044-4510
Примечания
: Cited References: 16
Предметные рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
ATOMIC-HYDROGEN
GENERATION
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3.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Aksenov S. V., Val'kov V. V., Ulanov E. A.
Заглавие
: A Fano
resonance
in transport characteristics of 1D atomic spin structures
Коллективы
: Институт теоретической физики им. Л. Д. Ландау РАН, Институт физики твердого тела РАН, "Mesoscopic and Strongly Correlated Electron Systems", conference (6; 2012 ; июнь ; 17-23; Черноголовка, Моск. обл.)
Место публикации
: Book of abstracts of Advances Research Workshop "Meso–2012". - 2012. - P.37
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4.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Babitskii A. N., Belyaev B. A., Boev N. M., Skomorokhov G. V., Izotov A. V., Galeev R. G.
Заглавие
: A magnetometer of weak quasi-stationary and high-frequency fields on resonator microstrip transducers with thin magnetic fields
Место публикации
: Instrum. Exp. Tech.: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 59, Is. 3. - P.425-432. - ISSN 00204412 (ISSN),
DOI
10.1134/S0020441216030131
Примечания
: Cited References: 23. - This study was performed within the framework of the State Job of the Ministry of Education and Science of the Russian Federation for the research at the Siberian Federal University in 2014 (project no. 3.528.2014K).
Предметные рубрики:
Ferromagnetic-
resonance
Films
Susceptibility
Anisotropy
Sensors
Trends
Аннотация:
A high-sensitivity magnetometer for simultaneous measurements of three components of a weak quasi-stationary or high-frequency magnetic-field vector was developed and investigated. Microstrip structures that are based on irregular resonators serve as the magnetometer transducers. An anisotropic thin-film magnetic structure is used as the sensing element. This structure consists of two thin magnetic films that are prepared by magnetron sputtering of a Ni75Fe25 permalloy target and separated by a silicon monoxide layer. It is demonstrated that the transducer exhibits the maximum sensitivity, when the easy magnetization axis of the film structure is orthogonal to the polarization direction of the pumping microwave magnetic field in the microstrip resonator and at an optimal value of a constant magnetic bias field and its optimal deflection from the pumping-field polarization direction which is parallel to it. The magnetometer is characterized by a wide dynamic range of measured magnetic fields, 10–10–10–4 Т, and a wide frequency range, 10–1–105 Hz. © 2016, Pleiades Publishing, Inc.
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5.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Berman G. P., Kolovsky A. R., Zaslavsky G. M.
Заглавие
: A non-linear
resonance
in a system of surface-state electrons bound to the helium surface
Место публикации
: Phys. Lett. A. - 1984. - Vol. 105, Is. 9. - P.483-486. - ISSN 0375-9601,
DOI
10.1016/0375-9601(84)91042-9
Примечания
: Cited References: 24
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6.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Berman G. P., Kolovsky A. R.
Заглавие
: A quantum nonlinear
resonance
with account of relaxation processes
Место публикации
: Physica A. - 1987. - Vol. 141, Is. 2-3. - P.602-612. - ISSN 0378-4371,
DOI
10.1016/0378-4371(87)90186-5
Примечания
: Cited References: 12
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7.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Komogortsev S. V., Vazhenina I. G., Kleshnina S. A., Iskhakov R. S., Lepalovskij V. N., Pasynkova A. A., Svalov A. V.
Заглавие
: Advanced characterization of FeNi-based films for the development of magnetic field sensors with tailored functional parameters
Место публикации
: Sensors. - 2022. - Vol. 22, Is. 9. - Ст.3324. - ISSN 14248220 (ISSN),
DOI
10.3390/s22093324
Примечания
: Cited References: 35. - This research was funded by the Russian Science Foundation (RSF), project no. 22-29-00980, https://rscf.ru/en/project/22-29-00980/ (accessed on 20 March 2022)
Аннотация:
Magnetometry and ferromagnetic
resonance
are used to quantitatively study magnetic anisotropy with an easy axis both in the film plane and perpendicular to it. In the study of single-layer and multilayer permalloy films, it is demonstrated that these methods make it possible not only to investigate the average field of perpendicular and in-plane anisotropy, but also to characterize their inhomogeneity. It is shown that the quantitative data from direct integral and local measurements of magnetic anisotropy are consistent with the direct and indirect estimates based on processing of the magnetization curves. The possibility of estimating the perpendicular magnetic anisotropy constant from the width of stripe domains in a film in the transcritical state is demonstrated. The average in-plane magnetic anisotropy field of permalloy films prepared by magnetron sputtering onto a Corning glass is almost unchanged with the thickness of a single-layer film. The inhomogeneity of the perpendicular anisotropy field for a 500 nm film is greater than that for a 100 nm film, and for a multilayer film with a total permalloy thickness of 500 nm, it is greater than that for a homogeneous film of the same thickness.
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8.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Bulgakov E. N., Pichugin K. N., Sadreev A. F.
Заглавие
: All-optical light storage in bound states in the continuum and release by demand
Коллективы
: Russian Scientific Foundation [14-12-00266]
Место публикации
: Opt. Express: Optical Society of America, 2015. - Vol. 23, Is. 17. - P.22520-22531. - ISSN 1094-4087,
DOI
10.1364/OE.23.022520
Примечания
: Cited References: 45. - This work was supported by Russian Scientific Foundation through Grant 14-12-00266. We acknowledge discussions with D.N. Maksimov
Предметные рубрики:
TRAPPED RAINBOW STORAGE
COUPLED-MODE THEORY
CRYSTAL WAVE-GUIDE
SLOW LIGHT
FANO
RESONANCE
METAMATERIALS
MICROCAVITY
CAVITIES
Аннотация:
In the framework of the temporal coupled mode theory we consider bound states embedded in the continuum (BSC) of photonic crystal waveguide as a capacity for light storage. A symmetry protected BSC occurs in two off-channel microresonators positioned symmetrically relative to the waveguide. We demonstrate that the symmetry protected BSC captures a fraction of a light pulse due to the Kerr effect as the pulse passes by the microresonators. However the amount of captured light is found to be strongly sensitive to the parameters of the gaussian light pulse such as basic frequency, duration and intensity. In contrast to the above case the BSC resulted from a full destructive interference of two eigenmodes of a single microresonator accumulates a fixed amount of light dependent on the material parameters of the microresonator but independent of the light pulse. The BSCs in the Fabry-Perot resonator show similar effects. We also show that the accumulated light can be released by a secondary pulse. These phenomena pave a way for all-optical storage and release of light. (C) 2015 Optical Society of America
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9.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Arkhipkin V. G., Myslivets S. A.
Заглавие
: All-optical switching in a photonic crystal with a defect containing an N-type four-level atomic system
Место публикации
: Phys. Rev. A: American Physical Society, 2012. - Vol. 86, Is. 6. - Ст.063816. - ISSN 1050-2947,
DOI
10.1103/PhysRevA.86.063816
Примечания
: Cited References: 33. - This work was supported in part by the RAS Grants No. 24.29, No. 24.31, and No. 3.9.5, and SB RAS Grants No. 43 and No. 101.
Предметные рубрики:
Electromagnetically-induced-transparency
Quantum interference
Microcavities
All-optical switching
Atomic medium
Cross-phase modulations
Defect mode
Electromagnetically induced transparency
Four-level atomic system
Kerr nonlinearity
Laser fields
Linear susceptibility
One dimensional photonic crystal
Probe field
Quantum interference
Resonance
frequencies
Third-order susceptibility
Transmission spectrums
Two photon
Аннотация:
We study the transmission spectra of a one-dimensional photonic crystal with a defect containing a four-level atomic medium that exhibits a greatly enhanced third-order susceptibility while having a vanishing linear susceptibility dependent on the electromagnetically induced transparency. Two ways of controlling the transmission of a photonic crystal are discussed: via absorption, i.e., nonlinear (two-photon) absorption of the probe field enhanced by constructive quantum interference, and via dispersion, which comes down to shifting the
resonance
frequency of the defect mode for the probe field by varying the refractive index based on the giant Kerr nonlinearity (cross-phase modulation). We demonstrate that such systems enable nonlinear all-optical switching at ultralow intensities of the coupling and switching laser fields.
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10.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Chzhan A. V., Podorozhnyak S. A., Mal'tsev V. K., Krayukhin I. N., Patrin G. S.
Заглавие
: Allotropic modifications of cobalt upon chemical deposition
Место публикации
: Phys. Solid State. - 2021. - Vol. 63, Is. 1. - P.42-46. - ISSN 10637834 (ISSN),
DOI
10.1134/S1063783421010054
Примечания
: Cited References: 17. - This study was supported in part by the Russian Foundation for Basic Research, project no. 18-02-00161-a
Аннотация:
The effect of the solution acidity on the crystal structure of cobalt during its chemical deposition is reported. It has been shown using the structural and magnetic examination and nuclear magnetic
resonance
study that the change in the working solution acidity leads to deposition of cobalt with different allotropic modifications in the nearest environment: the hcp type in the small (up to ~8.5) pH region and the fcc type in the large (over ~8.5) pH region. The formation of these cobalt modifications is attributed to the size effects caused by a decrease in the particle size with increasing pH.
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11.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Stolyar S. V., Li O. A., Nikolaeva E. D., Vorotynov A. M., Velikanov D. A., Knyazev Yu. V., Bayukov O. A., Iskhakov R. S., P’yankov V. F., Volochaev M. N.
Заглавие
: An effective method of magnetic hyperthermia based on the ferromagnetic
resonance
phenomenon
Место публикации
: Phys. Met. Metallogr. - 2023. - Vol. 124, Is. 2. - P.174-180. - ISSN 0031918X (ISSN),
DOI
10.1134/S0031918X22601834. - ISSN 15556190 (eISSN)
Примечания
: Cited References: 15. - This study was supported by grant no. 22-14-20020 from the Russian Science Foundation and the Krasnoyarsk Regional Fund for Support of Scientific and Technological Activities. The authors are grateful to the Krasnoyarsk Regional Center for Collective Use at Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, for providing their research facilities
Аннотация:
Nickel and cobalt ferrite nanoparticles have been synthesized using the chemical precipitation method; the nanoparticle sizes were found to be 63 ± 22 and 26 ± 4 nm, respectively. The static hysteresis loops and Mossbauer spectra have been measured. It is shown that cobalt ferrite powders are magnetically harder than nickel ferrite powders. Ferromagnetic
resonance
(FMR) curves have been studied. It is found that the FMR absorption for cobalt ferrite is observed at room temperature and above. The time dependences of the nanoparticle warm-up under FMR conditions have been measured. The maximum temperature changes for nickel ferrite and cobalt ferrite particles are 8 and 11 K, respectively. Using the example of cobalt ferrite powder, the possibility of effectively heating of particles in the FMR mode in their own field without using a DC magnetic field source is shown. The observed effect can be used in magnetic hyperthermia.
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12.
Вид документа
: Статья из сборника (выпуск продолж. издания)
Шифр издания
:
Автор(ы)
: Latyshev N. V., Kryukova O. V., Pyankov V. F., Stolyar S. V.
Заглавие
: Analysis of Ehrlich ascites carcinoma with electron paramagnetic
resonance
Коллективы
: IEEE Ural-Siberian Conference on Computational Technologies in Cognitive Science, Genomics and Biomedicine, Урало-Сибирская конференция по вычислительным технологиям в когнитивной науке, геномике и биомедицине, Институт цитологии и генетики СО РАН
Место публикации
: IEEE Ural-Siberian conference on computational technologies in cognitive science, genomics and biomedicine (CSGB). - 2021. - Ст.9496012. - P.290-293. -
DOI
10.1109/CSGB53040.2021.9496012
Примечания
: Cited References: 10
Аннотация:
The study was aimed to reveal the dependence of changes in the content of metal-containing proteins and freeradical forms in a suspension of the experimental tumor in different periods of tumor growth using electron paramagnetic
resonance
. The object of the study was Ehrlich's ascites carcinoma, an experimental undifferentiated tumor, which is used to study various aspects of tumor development under external influences. Ehrlich ascites carcinoma was inoculated into the peritoneal cavity of laboratory mice. We believe that the determination of the concentrations of metal-containing proteins and free-radical forms using this method may be an important prognostic parameter for assessing the state of the tumor. Changes in metabolism will inevitably affect the functionality of cells and, as a consequence, the dynamics of tumor growth. The results of the study showed that metalcontaining proteins belonging to ascites plasma, such as transferrin, ferritin and ceruloplasmin, do not undergo significant changes. The signal from molybdenum-containing proteins also does not change at the stages of experimental tumor growth under consideration. However, in the course of this experiment, it was possible to record a slight decrease in the intensity of the formation of denitrosyl iron complexes with the development of a tumor in the body.
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13.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Iskhakov R. S., Vazhenina I. G., Yakovchuk V. Yu.
Заглавие
: Angular and temperature dependences of ferromagnetic
resonance
in exchange-coupled FeNi/Dy/FeNi planar structures
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. 1, Sect.: Spintronics and magnetic nanostructures. - Ст.A.P52. - P.196-197. - ISBN 978-5-94469-051-7
Примечания
: Cited References: 1. - Support by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-42-240010 is acknowledged
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14.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Vazhenina I. G., Iskhakov R. S., Rautskii M. V., Milyaev M. A., Naumova L. I., Klepikova A. S.
Заглавие
: Angular dependences of uniform and non-uniform ferromagnetic
resonance
in multilayer films
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. 1. - Ст.B.P19. - P.193. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания
: Cited References: 2. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project No 18-42-243005 ”Synthesis and investigation of magnetic properties of gradient materials that are characterized by predetermine type of the magnetic parameter change”.
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15.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Ovchinnikov S. G., Rudenko V. V.
Заглавие
: Anisotropic interactions in magnetic crystals with S-state ions. Nanostructures
Коллективы
: Program of Federal Support for Leading Scientific Schools of the Russian Federation [NSh 1044.2012.2], President's Program of Support for Leading Scientific Schools [NSh-2886.2014.2], Russian Foundation for Basic Research [13-02-00358]
Место публикации
: Phys. Usp.: Turpion, 2014. - Vol. 57, Is. 12. - P.1180-1198. - ISSN 1063,
DOI
10.3367/UFNe.0184.201412b.1299. - ISSN 14684780(eISSN). - ISSN
Примечания
: Cited References:97. - We are grateful to L M Rudenko, T V Spirina, and N V Veretennikova for the assistance in the preparation of this review. This study was supported in part by the Program of Federal Support for Leading Scientific Schools of the Russian Federation (project No. NSh 1044.2012.2); by the President's Program of Support for Leading Scientific Schools (project No. NSh-2886.2014.2); and by the Russian Foundation for Basic Research (project No. 13-02-00358).
Предметные рубрики:
PARAMAGNETIC-
RESONANCE
ANTIFERROMAGNETIC-
RESONANCE
EXCHANGE
Аннотация:
Anisotropy mechanisms in compounds with S-state ions are discussed, including the 'single-ion' exchange mechanism that was developed theoretically by Nikiforov and coworkers based on the two-ion model and which has only recently received detailed experimental study. Results demonstrating the significant role of the 'single-ion' source are presented. An independent generalized method for quantitatively describing and predicting the anisotropy of magnetically ordered crystals is discussed, and its potential for the investigation of the BiFeO3 multiferroic in the region of the existence of a spin cycloid is examined. The anisotropic interactions responsible for the formation of nanostructures in the form of spin vortices (skyrmions) in MnSi and Cu2OSeO3 are analyzed.
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16.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Kuz'menko A. M., Mukhin A. A., Ivanov V. Yu., Kadomtseva A. M., Lebedev S. P., Bezmaternykh L. N.
Заглавие
: Antiferromagnetic
Resonance
and Dielectric Properties of Rare-earth Ferroborates in the Submillimeter Frequency Range
Место публикации
: J. Exp. Theor. Phys. - MOSCOW: PLEIADES PUBLISHING INC, 2011. - Vol. 113, Is. 1. - С. 113-120. - JUL. - ISSN 1063-7761,
DOI
10.1134/S106377611105013X. - ISSN 1090-6509
Примечания
: Cited Reference Count: 27. - Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [10-02-00846], This work was supported by the Russian Foundation for Basic Research, project no. 10-02-00846.
Предметные рубрики:
Physics, Multidisciplinary
Аннотация:
The magnetoresonance and dielectric properties of a number of crystals of a new family of multiferroics, namely, rare-earth ferroborates RFe3(BO3)(4) (R = Y, Eu, Pr, Tb, Tb0.25Er0.75), are studied in the submillimeter frequency range (nu = 3-20 cm(-1)). Ferroborates with R = Y, Tb, and Eu exhibit permittivity jumps at temperatures of 375, 198, and 58 K, respectively, which are caused by the R32 - P3(1)2(1) phase transition. Antiferromagnetic
resonance
(AFMR) modes in the subsystem of Fe3+ ions are detected in the range of antiferromagnetic ordering (T≺T-N=30-40K) in all ferroborates that have either an easy-plane (Y, Eu) or easy-axis (Pr, Tb, Tb0.25Er0.75) magnetic structure. The AFMR frequencies are found to depend strongly on the magnetic anisotropy of a rare-earth ion and its exchange interaction with the Fe subsystem, which determine the type of magnetic structure and the sign and magnitude of an effective anisotropy constant. The basic parameters of the magnetic interactions in these ferroborates are found, and the magnetoelectric contribution to AFMR is analyzed.
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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., Lebedev S. P., Bezmaternykh L. N.
Заглавие
: Antiferromagnetic
Resonance
and Dielectric Properties of Rare-earth Ferroborates in the Submillimeter Frequency Range
Место публикации
: J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 113, Is. 1. - P113-120. - ISSN 1063-7761,
DOI
10.1134/S106377611105013X
Примечания
: Cited References: 27. - This work was supported by the Russian Foundation for Basic Research, project no. 10-02-00846.
Предметные рубрики:
GDFE3(BO3)(4)
SPECTROSCOPY
CRYSTAL
Ключевые слова
(''Своб.индексиров.''): antiferromagnetic
resonance
--basic parameters--effective anisotropy constant--ferroborates--ferroics--ferromagnetic orderings--frequency ranges--magnetic interactions--magnetoresonance--millimeter frequency range--rare earth ions--submillimeters--antiferromagnetic materials--crystallography--erbium--europium--ferromagnetic
resonance
--ion exchange--magnetic anisotropy--magnetic devices--magnetic structure--permittivity--
resonance
--antiferromagnetism
Аннотация:
The magnetoresonance and dielectric properties of a number of crystals of a new family of multiferroics, namely, rare-earth ferroborates RFe(3)(BO(3))(4) (R = Y, Eu, Pr, Tb, Tb(0.25)Er(0.75)), are studied in the submillimeter frequency range (nu = 3-20 cm(-1)). Ferroborates with R = Y, Tb, and Eu exhibit permittivity jumps at temperatures of 375, 198, and 58 K, respectively, which are caused by the R32 - P3(1)2(1) phase transition. Antiferromagnetic
resonance
(AFMR) modes in the subsystem of Fe(3+) ions are detected in the range of antiferromagnetic ordering (T T(N)
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18.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Pankrats A. I., Zharkov S. M., Zeer G. M., Gudim I. A.
Заглавие
: Antiferromagnetic
resonance
and magnetic anisotropy in PrxY1−xFe3(BO3)4 crystals in the region of the magnetic structure transformation “easy axis – easy plane”
Место публикации
: J. Alloys Compd. - 2022. - Vol. 909. - Ст.164821. - ISSN 09258388 (ISSN),
DOI
10.1016/j.jallcom.2022.164821
Примечания
: Cited References: 37. - The authors acknowledge the assistance of R. Mironov in some
resonance
measurements. The SEM and EDS investigations were conducted in the SFU Joint Scientific Center supported by the State assignment (#FSRZ-2020–0011) of the Ministry of Science and Higher Education of the Russian Federation
Аннотация:
The spin dynamics, magnetic structures and magnetic anisotropy of single crystals PrxY1−xFe3(BO3)4 have been studied using antiferromagnetic
resonance
(AFMR) in a wide range of frequencies, magnetic fields, and temperatures. The frequency-field dependences of AFMR for the crystals with x = 0.25 and 0.45 are characteristic of antiferromagnets with the easy plane (EP) anisotropy. The crystals with x = 0.75 and 1.0 exhibit frequency-field dependences that are typical for antiferromagnets with the easy axis (EA) anisotropy. In these crystals, a significant decrease in the effective anisotropy fields of praseodymium upon the transition to the spin-flop state has been found. It is shown that this is the main reason for the large lability intervals, within which the regions of coexistence of the collinear and spin-flop states overlap. In the crystal with x = 0.67, the magnetic field applied along the trigonal axis of the crystal leads to the spin reorientation transition from the EA to the EP state. A magnetic phase diagram of the states on the plane "magnetic field - temperature" is built. In this crystal, the effective anisotropy field of praseodymium also decreases upon the transition to the field-induced EP state. Diamagnetic dilution of the praseodymium subsystem leads to the contribution of this subsystem to the total anisotropy field depending almost linearly on the praseodymium concentration.
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19.
Вид документа
: Статья из журнала
Шифр издания
:
Автор(ы)
: Pankrats A. I., Petrakovskii G. A., Bezmaternykh L. N., Temerov V. L.
Заглавие
: Antiferromagnetic
resonance
and magnetic anisotropy in single crystals of the YFe3(BO3)(4)-GdFe3(BO3)(4) system
Место публикации
: Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008. - Vol. 50, Is. 1. - P79-83. - ISSN 1063-7834,
DOI
10.1134/S1063783408010150
Примечания
: Cited References: 16
Предметные рубрики:
IRON BORATE GDFE3(BO3)(4)
ND3+
Аннотация:
The antiferromagnetic
resonance
in single crystals of the YFe3(BO3)(4)-GdFe3(BO3)(4) system is studied in the frequency range 25-140 GHz and the temperature range 4.2-50.0 K. It is established that the YFe3(BO3)(4) crystal containing only the magnetic subsystem of Fe3+ ions is an antiferromagnet with an easy anisotropy plane. The temperature dependences of the gaps in the antiferromagnetic
resonance
spectra of GdFe3(BO3)(4) and YxGd1-xFe3(BO3)(4) are used to calculate the contributions of the Fe3+ and Gd3+ subsystems to the magnetic anisotropy of these crystals. The contributions are found to be close in magnitude and have opposite signs. This leads to a relatively weak uniaxial anisotropy field in the crystals under investigation. Since the exchange interaction between the Gd3+ and Fe3+ ions magnetizes the magnetic subsystem of gadolinium, both subsystems start to contribute simultaneously at the Neel temperature of the iron subsystem.
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20.
Вид документа
: Статья из сборника (однотомник)
Шифр издания
:
Автор(ы)
: Tugarinov V. I., Pankrats A. I., Kondyan S., Velikanov D. A., Temerov V. L.
Заглавие
: Antiferromagnetic
resonance
and magnetic investigations of rare-earth ferroborates
Коллективы
: Moscow International Symposium on Magnetism
Место публикации
: Moscow Int. Symp. on Magnet. (MISM-2011): Book of abstracts. - 2011. - Ст.24OR-O-10. - P.623
Примечания
: Библиогр.: 3. - Work is supported by RFBR grant 10-02-00765
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