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1.


   
    Magnetic and magneto-optical properties of ion-synthesized cobalt nanoparticles in silicon oxide / I. S. Edelman [et al.] // Phys. Solid State. - 2008. - Vol. 50, Is. 11. - P. 2088-2094, DOI 10.1134/S1063783408110140. - 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. . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
NANOCLUSTERS
Кл.слова (ненормированные):
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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Держатели документа:
[Edelman, I. S.
Seredkin, V. A.
Zabluda, V. N.
Ivantsov, R. D.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Vorotynova, O. V.] Siberian Fed Univ, Inst Urban Construct Management & Reg Econ, Krasnoyarsk 660041, Russia
[Gatiyatova, Yu. I.
Valeev, V. F.
Khaibullin, R. I.
Stepanov, A. L.] Russian Acad Sci, Zavoisky Phys Tech Inst, Kazan 420029, Russia
[Stepanov, A. L.] Laser Zentrum Hannover, D-30419 Hannover, Germany
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Institute of Urban Construction, Management, and Regional Economics, Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk 660041, Russian Federation
Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Sibirskii trakt 10/7, Kazan 420029, Russian Federation
Laser Zentrum Hannover, Hollerithallee 8, Hannover D-30419, Germany

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Vorotynova, O. V.; Seredkin, V. A.; Середкин, Виталий Александрович; Zabluda, V. N.; Заблуда, Владимир Николаевич; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Gatiyatova, Y. I.; Valeev, V. F.; Khaibullin, R. I.; Stepanov, A. L.
}
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2.


   
    Increase in the Diamagnetic Response from Low-Density Bi1.8Pb0.3Sr1.9Ca2Cu3Ox High-Temperature Superconductors and Bi1.8Pb0.3Sr1.9Ca2Cu3Ox + Ag Composites / M. I. Petrov [et al.] // Tech. Phys. - 2009. - Vol. 54, Is. 8. - P. 1130-1134, DOI 10.1134/S1063784209080064. - Cited References: 9. - This work was supported by the program "Quantum Macrophysics," Russian Academy of Sciences; complex integration project nos. 3 and 4, Siberian Branch, Russian Academy of Sciences; and Krasnoyarsk Territorial Science Foundation (grant nos. 17G057, 18G148, and 18G011). . - ISSN 1063-7842
РУБ Physics, Applied

Кл.слова (ненормированные):
74.62.Bf -- 74.72.Hs -- 75.60.Ej
Аннотация: Low-density polycrystalline Bi1.8Pb0.3Sr1.9Ca2Cu3Ox high-temperature superconductors with a foamlike microstructure and composites consisting of this superconductor and silver in an amount of 20, 25, and 30 vol % are synthesized. The microstructure, as well as the temperature and field dependences of the magnetization, M(T) and M(H), are studied. It is found that, in Bi1.8Pb0.3Sr1.9Ca2Cu3Ox high-temperature superconductors and Bi1.8Pb0.3Sr1.9Ca2Cu3Ox + Ag composites, the diamagnetic response is enhanced and the screening properties are improved compared with high-temperature polycrystalline superconductors with the same composition that are prepared by the standard technology. The observed effect is explained by the features of magnetic flux penetration into a porous medium.

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Держатели документа:
[Petrov, M. I.
Balaev, D. A.
Popkov, S. I.
Dubrovskii, A. A.
Shaykhutdinov, K. A.] Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Belozerova, I. L.] Reshetnyov Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
[Mart'yanov, O. N.] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 660090, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Reshetnyov Siberian State Aerospace University, pr. Imeni Gazety Krasnoyarskii Rabochii 31, Krasnoyarsk, 660014, Russian Federation
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent'eva 5, Novosibirsk, 660090, Russian Federation

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Belozerova, I. L.; Popkov, S. I.; Попков, Сергей Иванович; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Mart'yanov, O. N.; Russian Academy of Sciences; Krasnoyarsk Territorial Science Foundation [17G057, 18G148, 18G011]
}
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