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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : APLESNIN S. S.
Заглавие : CRITICAL-BEHAVIOR OF DILUTED ISING MAGNETS WITH ANISOTROPIC EXCHANGE INTERACTION DISTRIBUTION
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1984. - Vol. 26, Is. 11. - P3355-3361. - ISSN 0367-3294
Примечания : Cited References: 19
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Cherkasskii M., Farle M., Semisalova A.
Заглавие : Nutation resonance in ferromagnets
Место публикации : Phys. Rev. B. - 2020. - Vol. 102, Is. 18. - Ст.184432. - ISSN 24699950 (ISSN), DOI 10.1103/PhysRevB.102.184432
Примечания : Cited References: 42. - We thank Benjamin Zingsem for helpful discussions. In part funded by Research Grant No. 075-15-2019-1886 from the Government of the Russian Federation, the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), Projects No. 405553726 (CRC/TRR 270) and No. 392402498 (SE 2853/1-1)
Аннотация: The inertial dynamics of magnetization in a ferromagnet is investigated theoretically. The analytically derived dynamic response upon microwave excitation shows two peaks: ferromagnetic and nutation resonances. The exact analytical expressions of frequency and linewidth of the magnetic nutation resonance are deduced from the frequency-dependent susceptibility determined by the inertial Landau-Lifshitz-Gilbert equation. The study shows that the dependence of nutation linewidth on the Gilbert precession damping has a minimum, which becomes more expressive with increase of the applied magnetic field.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Klauss H. H., Luetkens H., Klingeler R., Hess C., Litterst F. J., Kraken M., Korshunov M. M., Eremin I., Drechsler S. L., Khasanov R., Amato A., Hamann-Borrero J. E., Leps N., Kondrat A., Behr G., Werner J., Buchner B.
Заглавие : Commensurate spin density wave in LaFeAsO: A local probe study
Место публикации : Phys. Rev. Lett.: AMER PHYSICAL SOC, 2008. - Vol. 101, Is. 7. - Ст.77005. - ISSN 0031-9007, DOI 10.1103/PhysRevLett.101.077005
Примечания : Cited References: 28
Предметные рубрики: LAYERED QUATERNARY COMPOUND
SUPERCONDUCTIVITY
Ключевые слова (''Своб.индексиров.''): arsenic compounds--chlorine compounds--ferromagnetism--magnetic materials--magnetic properties--magnetization--magnets--molybdenum--phase transitions--spin density waves--commensurate spin density wave--external fields--magnetic orders--muon spin relaxations--order parameter--ordered moments--probe measurements--ssbauer spectroscopy--structural phase transition--sublattice magnetizations--temperature dependences--spin dynamics
Аннотация: We present a detailed study on the magnetic order in the undoped mother compound LaFeAsO of the recently discovered Fe-based superconductor LaFeAsO(1-x)F(x). In particular, we present local probe measurements of the magnetic properties of LaFeAsO by means of (57)Fe Mossbauer spectroscopy and muon-spin relaxation in zero external field along with magnetization and resistivity studies. These experiments prove a commensurate static magnetic order with a strongly reduced ordered moment of 0.25(5)mu(B) at the iron site below T(N)=138 K, well separated from a structural phase transition at T(S)=156 K. The temperature dependence of the sublattice magnetization is determined and compared to theory. Using a four-band spin density wave model both, the size of the order parameter and the quick saturation below T(N) are reproduced.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Edelman I., Kliava J.
Заглавие : Oxide glasses with magnetic nanoparticles: transparent magnets (Faraday rotation and electron magnetic resonance studies)
Коллективы : RFBR-CNRS [07-02-92174]
Разночтения заглавия :авие SCOPUS: Oxide glasses with magnetic nanoparticles: Transparent magnets (Faraday rotation and electron magnetic resonance studies)
Место публикации : Phys. Status Solidi B. - 2009. - Vol. 246, Is. 10. - P.2216-2231. - ISSN 0370-1972, DOI 10.1002/pssb.200945169
Примечания : Cited References: 87. - This work is supported in part by RFBR-CNRS joint project, grant No 07-02-92174. We are grateful to E. Petrakovskaja and O. Ivanova for measuring and discussing, respectively, the EMR spectra in thermally treated samples and the FR spectral and magnetic field dependences.
Предметные рубрики: SPIN-HAMILTONIAN PARAMETERS
SINGLE-DOMAIN PARTICLES
SUPERPARAMAGNETIC RESONANCE
CRYSTALLIZATION BEHAVIOR
FERRIMAGNETIC RESONANCE
PARAMAGNETIC-RESONANCE
TEMPERATURE-DEPENDENCE
COMPUTER-SIMULATIONS
FINE PARTICLES
BORATE GLASSES
Аннотация: In the first part of this paper we outline the state of the art in the field of magnetic nanoparticles in oxide glasses. We describe the theoretical background of two complementary techniques used for the studies of the state of paramagnetic ions, clusters and magnetic particles in a diamagnetic matrix, viz., magnetooptical Faraday rotation (FR) and electron magnetic resonance (EMIR) and we overview previous results obtained with these techniques for several glass systems. In the second part, we highlight the case of potassium-alumina-borate glasses - a glassy system where doping with paramagnetic oxides results in formation of magnetic particles at very low contents of paramagnetic additions: Fe(2)O(3) and MnO. In the special case when the ratio of the iron and manganese oxides in the charge is 3/2, magnetic nanoparticles with characteristics close to those of manganese ferrite are formed already at the first stage of the glass preparation. After thermal treatment all glasses show FR and EMR spectra attesting to the presence of superparamagnetic nanoparticles, characterized by relatively broad size and shape distributions. The formation of magnetic nanoparticles confers to these glasses magnetic and magnetooptical properties typical of magnetically ordered substances. At the same time, the glasses remain transparent in a part of the visible and near infrared spectral range and display a high FR value. Such properties make them particularly interesting for use as new media for various magneto-optical devices. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kablov E. N., Piskorskii V. P., Valeev R. A., Volkov N. V., Davydova E. A., Shaikhutdinov K. A., Balaev D. A., Semenov S. V.
Заглавие : Effect of copper on the properties of Pr-Dy-Fe-Co-B sintered magnets
Место публикации : Russ. Metall. (Metally): Pleiades Publishing, 2014. - Vol. 2014, Is. 1. - P.55-59. - ISSN 0036-0295, DOI 10.1134/S0036029514010078. - ISSN 1555-6255
Примечания : Cited References: 15
Аннотация: The effect of copper on the properties of magnets (Pr0.52Dy0.48)13(Fe65Co0.35)80.3 - xCuxB6.7 (x = 0-10) has been studied. Alloying with copper is shown to decrease the sintering temperature and to increase the content of the principal (Pr,Dy)2(Fe,Co)14B magnetic phase. For compositions with x = 1.3-3.3, copper is found to affect the value and sign of the temperature induction coefficient (TIC). It is shown that the effect of copper on the TIC is determined by the substitution of copper ions for iron ions in lattice sites, which are coupled via an antiferromagnetic exchange interaction. © 2014 Pleiades Publishing, Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shustin M. S., Potkina M. N.
Заглавие : Effective easy-axis anisotropy of the two-sublattice single-chain magnet with twisted easy planes
Коллективы : Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" [20-1-4-25-1, 19-1-1-12-2]
Место публикации : Nanosyst. - Phys. Chem. Math. - 2020. - Vol. 11, Is. 6. - P.659-665. - ISSN 2220-8054, DOI 10.17586/2220-8054-2020-11-6-659-665; Наносистемы: физ., хим., матем. - ISSN 2305-7971(eISSN)
Примечания : Cited References: 15. - S. M. S. expresses deep gratitude to V. V. Val'kov. The main results of this work were with substantial use of the theory developed by him (see for example articles [10], [12] and references given in them), as well as on his previous advice. S. M. S. and M. N. P. acknowledges the support from the Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" (Grants No. 20-1-4-25-1 and 19-1-1-12-2, respectively)
Аннотация: An analytical solution for the spin-wave spectrum of the two-sublattice 1D magnet with SA = SB = 1 and twisting easy planes has been obtained. Such planes are mutually twisted by an angle φ relative to each other. For the case of mutually orthogonal easy planes φ = π/2, the spectrum vs. quasi-momentum dependence has been compared with that of an easy-axis magnet with the easy axis aligned along the line of intersection of the planes. An analogy of the spectra of the models has been shown, indicating the possibility of the effective easy axis anisotropy in easy-plane two-sublattice single-chain magnets.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ignatchenko V.A.
Заглавие : Effects of correlated inhomogeneities of the spectral properties of disordered ferro magnets and superlattices
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Уральское отделение РАН
Место публикации : IV Euro-Asian Symposium "Trends in MAGnetism" Nanospintronics (EASTMAG-2010). School for young scientist "Spintronics": June 28 - Lule 2, 2010"Book of abstracts. - Ekaterinburg, 2010. - P.300 (Invited)
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Koblischka, Michael R., Koblischka-Veneva, Anjela, Gokhfeld D. M., Naik, S. Pavan Kumar, Nouailhetas, Quentin, Berger, Kevin, Douine, Bruno
Заглавие : Flux pinning docking interfaces in satellites using superconducting foams as trapped field magnets
Коллективы : ANRFrench National Research Agency (ANR); DFGGerman Research Foundation (DFG)European Commission [ANR-17-CE05-0030, DFG-ANR Ko2323-10]
Место публикации : IEEE Trans. Appl. Supercond. - 2022. - Vol. 32, Is. 4. - Ст.4900105. - ISSN 1051-8223, DOI 10.1109/TASC.2022.3147734. - ISSN 1558-2515(eISSN)
Примечания : Cited References: 44. - This work was supported in part by SUPERFOAM international project funded by ANR and DFG under Grants ANR-17-CE05-0030 and DFG-ANR Ko2323-10.
Предметные рубрики: BULK
RECONFIGURATION
MAGNETIZATION
Аннотация: Flux-Pinning Docking Interfaces (FPDI) in satellite systems were developed using bulk superconductors and permanent magnets in previous works. However, such FPDIs have limited magnetic field strength, consist of heavy-weight material, and can only be used with a single purpose, i.e., as chasing or docking satellite. Replacing the magnetic material in the FPDI by a trapped field (TF)-magnet would enable the interface to operate for both purposes, i.e., generating a (stronger) magnetic field and trapping it. We show the requirements for such a system and discuss the possible gains when using a TF-FPDI in satellites. To reduce the system weight, the use of superconducting foams as superconducting material is discussed in detail. Furthermore, the use of superconducting foams, the size of which can be easily upscaled, may also comprise the function of the damping material, so even more weight could be saved for the payload.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Iskhakov R. S.
Заглавие : Law of approach to magnetic saturation in nanocrystalline and amorphous ferromagnets with improved transition behavior between power-law regimes
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : J. Magn. Magn. Mater.: Elsevier, 2017. - Vol. 440. - P.213-216. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2016.12.145
Примечания : Cited References: 41. - The work has been supported by Russian Foundation for Basic Research, Grant nos. 16-03-00256, 15-08-06673 and RFBR-KRFS 15–42-04171.
Ключевые слова (''Своб.индексиров.''): ferromagnetic materials--ferromagnetism--magnetic anisotropy--magnetism--magnets--nanocrystals--perturbation techniques--asymptotic regimes--law of approaches--nanocrystalline and amorphous--perturbation theory--power law regime--random magnetic anisotropies--transition behavior--transition modes--saturation magnetization
Аннотация: New law of the approach to magnetic saturation is proposed based on scaling in ferromagnets with random magnetic anisotropy. This law is consistent with the known laws derived within perturbation theory in extreme cases, but it describes the transition mode between the power-low asymptotic regimes better. The improved law is proper for reliable fitting the approach magnetization to saturation in nanocrystalline and amorphous ferromagnets. © 2017 Elsevier B.V.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzmin E. V.
Заглавие : Ground-state and excitation spectrum of disordered heisenberg magnets
Место публикации : Zhurnal Eksperimentalnoi Teor. Fiz. - 1984. - Vol. 86, Is. 3. - P.981-994. - ISSN 0044-4510
Примечания : Cited References: 21
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