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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Edelman I. S., Vorotynova O. V., Seredkin V. A., Zabluda V. N., Ivantsov R. D., Gatiyatova Y. I., Valeev V. F., Khaibullin R. I., Stepanov A. L.
Заглавие : Magnetic and magneto-optical properties of ion-synthesized cobalt nanoparticles in silicon oxide
Коллективы :
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008. - Vol. 50, Is. 11. - P2088-2094. - ISSN 1063-7834, DOI 10.1134/S1063783408110140
Примечания : Cited References: 15. - We would like to thank the Alexander von Humboldt Foundation (Germany) for the financial support of A. L. Stepanov in Germany.This study was supported by the Russian Foundation for Basic Research (project nos. 04-02-97505- r_ofi, 06-02-08147_ofi, 07-02-92174- CNRS) and the Branch of General Physics and Astronomy of the Russian Academy of Sciences (Program "New Materials and Structures"). R. D. Ivantsov acknowledges the support of the Russian Science Support Foundation.
Предметные рубрики: NANOCLUSTERS
Ключевые слова (''Своб.индексиров.''): 75--60--ej--78--20--ls--61--46--df
Аннотация: The magnetic and magneto-optical properties of ion-synthesized cobalt nanoparticles in the amorphous silicon oxide matrix are investigated as a function of the implantation dose. The analysis of the field dependences of the magnetization and the magneto-optical Faraday and Kerr effects demonstrates that, as the ion implantation dose increases, the superparamagnetic behavior of an ensemble of cobalt nanoparticles at room temperature gives way to a ferromagnetic response with the anisotropy characteristic of a thin magnetic film. The magnetization curves for the superparamagnetic and ferromagnetic ensembles of cobalt nanoparticles are simulated to determine their average sizes and the filling density in the irradiated layer of the silicon dioxide matrix. It is revealed that the spectral dependences of the Faraday and Kerr effects for ion-synthesized cobalt nanoparticles differ substantially from those for continuous cobalt films due to the localized excitations of free electrons in the nanoparticles.
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