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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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    Angular tuning of defect modes spectrum in the one-dimensional photonic crystal with liquid-crystal layer / V. G. Arkhipkin [et al.] // Eur. Phys. J. E. - 2007. - Vol. 24, Is. 3. - P297-302, DOI 10.1140/epje/i2007-10239-7. - Cited Reference Count: 28 . - NOV. - ISSN 1292-8941
Рубрики:
PERIODIC STRUCTURE
   REFRACTIVE-INDEX
   ENHANCEMENT
   LIGHT
   LASER
Кл.слова (ненормированные):
42.25.Bs Wave propagation, transmission and absorption -- 42.70.Df Liquid crystals -- 42.70.Qs Photonic bandgap materials -- Angles of incidence -- Angular tuning -- Defect modes -- Electric polarization -- Photonic bandgap materials -- Radiation losses -- Absorption -- Defects -- Light polarization -- Liquid crystals -- One dimensional -- Phase shift -- Wave propagation -- Photonic crystals
Аннотация: A one-dimensional ZrO2/SiO2 photonic crystal with a 4-n -pentyl-4'-cyanobiphenyl (5CB) nematic defect layer was used to investigate the transmission spectra of light polarized parallel and perpendicular to the liquid-crystal director at different angles of incidence. The spectra of the photonic crystal were shown to split into four polarized components T-ij at oblique incidence. When the incident angle increased, the bandgap edges and the defect modes shifted towards short wavelengths, while the amplitudes of the defect modes increased for the transverse magnetic polarization and decreased for the transverse electric polarization. The observed discrepancy between the defect mode amplitudes in the center and near the edges of the photonic bandgap was found to be related to the radiation losses inside the defect layer of a non-ideal photonic crystal. The simulated transmission spectra obtained using recurrence relations and taking into account the decay of defect modes are in good agreement with the experimental data.

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Держатели документа:
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович
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