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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) : Vorotynov A. M., Petrakovskii G. A., Rudenko V. V.
Заглавие : Exchange dependence of the spin-Hamiltonian constants for antiferromagnetically coupled S-ion pairs
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2010. - Vol. 52, Is. 7. - P1424-1426. - ISSN 1063-7834, DOI 10.1134/S1063783410070164
Примечания : Cited References: 10
Предметные рубрики: PARAMAGNETIC-RESONANCE
MAGNETIC-ANISOTROPY
GARNETS
Аннотация: Experimental data that indicate the existence of an exchange-dependent contribution to single-ion spin-Hamiltonian constants for antiferromagnetically coupled S-ion pairs in diamagnetic crystals are reported and generalized.
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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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