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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Edel'man I. S., Petrov D. A., Ivantsov R. D., Zharkov S. M., Khaibullin R. I., Valeev V. F., Nuzhdin V. I., Stepanov A. L.
Заглавие : Microstructure and Magnetooptics of Silicon Oxide with Implanted Nickel Nanoparticles
Разночтения заглавия :авие SCOPUS: Microstructure and magnetooptics of silicon oxide with implanted nickel nanoparticles
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 113, Is. 6. - P1040-1049. - ISSN 1063-7761, DOI 10.1134/S1063776111160035
Примечания : Cited References: 44. - This work was supported by the Russian Foundation for Basic Research (project nos. 11-02-00972, 11-02-90420, 11-02-91341) and the program Research and Scientific-Pedagogical Brainpower of Innovated Russia (State contract 02.740.11.0797).
Предметные рубрики: SIMPLE METAL-CLUSTERS
OPTICAL-PROPERTIES
ION-IMPLANTATION
FARADAY-ROTATION
KERR SPECTRA
GLASS
RESONANCE
PHYSICS
ENERGY
FE
Ключевые слова (''Своб.индексиров.''): disperse structure--effective medium model--implanted samples--irradiation dose--magnetic circular dichroisms--magnetic nickel--magneto-optical faraday effect--magneto-optical measurements--matrix--metal nanoparticles--metallic nickel--nickel nanoparticles--nickel particles--optical range--spectral dependences--surface plasma resonances--tensor components--thin near-surface layers--amorphous silicon--crystal microstructure--dichroism--faraday effect--ion implantation--magnetoplasma--metallic compounds--nanomagnetics--nanoparticles--nickel--silicon compounds--silicon oxides--spectroscopy--tensors--transmission electron microscopy--nickel oxide
Аннотация: Metallic nickel nanoparticles of various sizes are formed in a thin near-surface layer in an amorphous SiO2 matrix during 40-keV Ni+ ion implantation at a dose of (0.25-1.0) x 10(17) ions/cm(2). The micro-structure of the irradiated layer and the crystal structure, morphology, and sizes of nickel particles formed at various irradiation doses are studied by transmission electron microscopy and electron diffraction. The magnetooptical Faraday effect and the magnetic circular dichroism in an ensemble of nickel nanoparticles are studied in the optical range. The permittivity (epsilon) over cap tensor components are calculated for the implanted samples using an effective medium model with allowance for the results of magnetooptical measurements. The spectral dependences of the tensor (epsilon) over cap components are found to be strongly different from those of a continuous metallic nickel film. These differences are related to a disperse structure of the magnetic nickel phase and to a surface plasma resonance in the metal nanoparticles.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Edelman I. S., Petrakovskaja E. A., Petrov D. A., Zharkov S. M., Khaibullin R. I., Nuzhdin V. I., Stepanov A. L.
Заглавие : FMR and TEM Studies of Co and Ni Nanoparticles Implanted in the SiO2 Matrix
Место публикации : Appl. Magn. Reson. - WIEN: SPRINGER WIEN, 2011. - Vol. 40, Is. 3. - С. 363-375. - MAY. - ISSN 0937-9347, DOI 10.1007/s00723-011-0218-4. - ISSN 1613-7507
Примечания : Cited Reference Count: 51. - Гранты: The work was supported in part by the Russian Foundation for Basic Research, grant no. 11-02-00972-a, Ministry of Education and Science of the Russian Federation, Federal Target Program "Scientific and scientific-pedagogical personnel of innovative Russia'', contract no. 02.740.11.0797, and State Program "Development of the Scientific Potential of the Higher Education School'', project no. 2.1.1/6038. S.M. Zharkov acknowledges the financial support of the Russian government contract no. 02.740.11.0568. The electron microscopy investigations were carried out at the Joint Center of the Siberian Federal University.Финансирующая организация: Russian Foundation for Basic Research [11-02-00972-a]; Ministry of Education and Science of the Russian Federation [02.740.11.0797]; State Program "Development of the Scientific Potential of the Higher Education School'' [2.1.1/6038]; Russian government [02.740.11.0568]
Предметные рубрики: FERROMAGNETIC-RESONANCE
MAGNETIC-PROPERTIES
THIN-FILMS
COBALT NANOPARTICLES
ION-IMPLANTATION
FINE PARTICLES
GRANULAR FILMS
ANISOTROPY
POLYIMIDES
RUTILE
Ключевые слова (''Своб.индексиров.''): energy dispersive x ray spectroscopy--face-centered cubic structure--fused silica plates--g factors--hexagonal close packing--high dose--high-dose implantation--implantation dose--implanted samples--line shape--magnetic parameters--matrix--metal nanoparticles--ni nanoparticles--nonsymmetric--out-of-plane--room temperature--spherical shape--subsurface layer--tem--temperature dependence--thin magnetic films--uniaxial magnetic anisotropy--cobalt--fused silica--magnetic anisotropy--nanoparticles--silica--silicon compounds--transmission electron microscopy--x ray spectroscopy--ferromagnetic resonance
Аннотация: Fused silica plates have been implanted with 40 keV Co+ or Ni+ ions to high doses in the range of (0.25-1.0) x 10(17) ions/cm(2), and magnetic properties of the implanted samples have been studied with ferromagnetic resonance (FMR) technique supplemented by transmission electron microscopy, electron diffraction and energy dispersive X-ray spectroscopy. The high-dose implantation with 3d-ions results in the formation of cobalt and nickel metal nanoparticles in the irradiated subsurface layer of the SiO2 matrix. Co and Ni nanocrystals with hexagonal close packing and face-centered cubic structures have a spherical shape and the sizes of 4-5 nm (for cobalt) and 6-14 nm (for nickel) in diameter. Room-temperature FMR signals from ensembles of Co and Ni nanoparticles implanted in the SiO2 matrix exhibit an out-of-plane uniaxial magnetic anisotropy that is typical for thin magnetic films. The dose and temperature dependences of FMR spectra have been analyzed using the Kittel formalism, and the effective magnetization and g-factor values have been obtained for Co- and Ni-implanted samples. Nonsymmetric FMR line shapes have been fitted by a sum of two symmetrical curves. The dependences of the magnetic parameters of each curve on the implantation dose and temperature are presented.
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