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Title: Dynamic magnetic permeability of the heterogeneous nanosystems based on (Co{sub 41}Fe{sub 39}B{sub 20}){sub x}(SiO{sub 2}){sub 100–} {sub x} composites

Abstract

Thin films of (Co{sub 41}Fe{sub 39}B{sub 20}){sub x}(SiO{sub 2}){sub 100–} {sub x} nanocomposites and hybrid nanocomposite–semiconductor [(Co{sub 41}Fe{sub 39}B{sub 20}){sub x}(SiO{sub 2}){sub 100–} {sub x}/C]{sub 50} multilayers are synthesized by ion-beam deposition at various contents x of ferromagnetic metallic Co{sub 41}Fe{sub 39}B{sub 2O} nanogranules in an SiO{sub 2} matrix and at various carbon layer thicknesses h < 2 nm. Their magnetic and electrical properties, high-frequency magnetic permeability, magnetooptical spectra, and FMR spectra are studied. It is found that both the single-layer nanocomposites and the multilayers with carbon interlayers are superparamagnetic at x < x{sub per}, where x{sub per} is the electric conduction percolation threshold: a hysteresis at room temperature is absent, and the blocking temperature determined in quasi-static measurements does not exceed 20–30 K and weakly depends on the carbon layer thickness. At a carbon layer thickness h = 1.2–1.8 nm, the real and imaginary parts of complex magnetic permeability at 50 MHz and room temperature are substantially higher than those of the nanocomposites without carbon layers: their values are typical of ferromagnets. This dependence points to an exchange interaction between nanogranules in layers through a carbon interlayer. The influence of a conducting layer on the static and dynamic magneticmore » properties of a system of interacting superparamagnetic particles is discussed.« less

Authors:
 [1]; ; ;  [2];  [3];  [2];  [4];  [1];  [5]
  1. Moscow State University, Faculty of Physics (Russian Federation)
  2. Voronezh State Technical University (Russian Federation)
  3. Russian Academy of Sciences, Institute for Theoretical and Applied Electrodynamics (Russian Federation)
  4. Shtemenko Krasnodar Higher Military School (Russian Federation)
  5. Russian Research Centre “Kurchatov Institute,” (Russian Federation)
Publication Date:
OSTI Identifier:
22756362
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 125; Journal Issue: 2; Other Information: Copyright (c) 2017 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE; ELECTRIC CONDUCTIVITY; EXCHANGE INTERACTIONS; ION BEAMS; LAYERS; MAGNETIC SUSCEPTIBILITY; MATRICES; MHZ RANGE 01-100; NANOCOMPOSITES; SILICA; SILICON OXIDES; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0273-0400 K; THIN FILMS

Citation Formats

Granovskii, A. B., E-mail: granov@magn.ru, E-mail: gran60@mail.ru, Kalinin, Yu. E., E-mail: kalinin48@mail.ru, Kashirin, M. A., Kolmakov, D. V., Ryl’kov, V. V., Sitnikov, A. V., Vyzulin, S. A., Gan’shina, E. A., and Taldenkov, A. N. Dynamic magnetic permeability of the heterogeneous nanosystems based on (Co{sub 41}Fe{sub 39}B{sub 20}){sub x}(SiO{sub 2}){sub 100–} {sub x} composites. United States: N. p., 2017. Web. doi:10.1134/S1063776117070032.
Granovskii, A. B., E-mail: granov@magn.ru, E-mail: gran60@mail.ru, Kalinin, Yu. E., E-mail: kalinin48@mail.ru, Kashirin, M. A., Kolmakov, D. V., Ryl’kov, V. V., Sitnikov, A. V., Vyzulin, S. A., Gan’shina, E. A., & Taldenkov, A. N. Dynamic magnetic permeability of the heterogeneous nanosystems based on (Co{sub 41}Fe{sub 39}B{sub 20}){sub x}(SiO{sub 2}){sub 100–} {sub x} composites. United States. doi:10.1134/S1063776117070032.
Granovskii, A. B., E-mail: granov@magn.ru, E-mail: gran60@mail.ru, Kalinin, Yu. E., E-mail: kalinin48@mail.ru, Kashirin, M. A., Kolmakov, D. V., Ryl’kov, V. V., Sitnikov, A. V., Vyzulin, S. A., Gan’shina, E. A., and Taldenkov, A. N. Tue . "Dynamic magnetic permeability of the heterogeneous nanosystems based on (Co{sub 41}Fe{sub 39}B{sub 20}){sub x}(SiO{sub 2}){sub 100–} {sub x} composites". United States. doi:10.1134/S1063776117070032.
@article{osti_22756362,
title = {Dynamic magnetic permeability of the heterogeneous nanosystems based on (Co{sub 41}Fe{sub 39}B{sub 20}){sub x}(SiO{sub 2}){sub 100–} {sub x} composites},
author = {Granovskii, A. B., E-mail: granov@magn.ru, E-mail: gran60@mail.ru and Kalinin, Yu. E., E-mail: kalinin48@mail.ru and Kashirin, M. A. and Kolmakov, D. V. and Ryl’kov, V. V. and Sitnikov, A. V. and Vyzulin, S. A. and Gan’shina, E. A. and Taldenkov, A. N.},
abstractNote = {Thin films of (Co{sub 41}Fe{sub 39}B{sub 20}){sub x}(SiO{sub 2}){sub 100–} {sub x} nanocomposites and hybrid nanocomposite–semiconductor [(Co{sub 41}Fe{sub 39}B{sub 20}){sub x}(SiO{sub 2}){sub 100–} {sub x}/C]{sub 50} multilayers are synthesized by ion-beam deposition at various contents x of ferromagnetic metallic Co{sub 41}Fe{sub 39}B{sub 2O} nanogranules in an SiO{sub 2} matrix and at various carbon layer thicknesses h < 2 nm. Their magnetic and electrical properties, high-frequency magnetic permeability, magnetooptical spectra, and FMR spectra are studied. It is found that both the single-layer nanocomposites and the multilayers with carbon interlayers are superparamagnetic at x < x{sub per}, where x{sub per} is the electric conduction percolation threshold: a hysteresis at room temperature is absent, and the blocking temperature determined in quasi-static measurements does not exceed 20–30 K and weakly depends on the carbon layer thickness. At a carbon layer thickness h = 1.2–1.8 nm, the real and imaginary parts of complex magnetic permeability at 50 MHz and room temperature are substantially higher than those of the nanocomposites without carbon layers: their values are typical of ferromagnets. This dependence points to an exchange interaction between nanogranules in layers through a carbon interlayer. The influence of a conducting layer on the static and dynamic magnetic properties of a system of interacting superparamagnetic particles is discussed.},
doi = {10.1134/S1063776117070032},
journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 2,
volume = 125,
place = {United States},
year = {2017},
month = {8}
}