Paper Title:
Exchange Interaction in the Co-SiO2 Nanocomposite Films
  Abstract

The properties of Co-SiO2 nanogranular composite films, containing a Co volume fraction ranging from 0.3 to 0.8, have been characterized by means of magnetic measurements, NMR study, and ferromagnetic resonance. Thermal decrease of CoX(SiO2)100-X magnetization follows the T3/2 law and allows to estimate the exchange interaction constant A. With growing nominal Co content the transitions from granular to continuous structural state at 36% Co are registered by FMR measurements. The spectrum of standing spin-wave has been detected in the perpendicular experiment configuration for films with the Co content above 52 vol. %. It is found that the type of the dispersion relation of spin waves in Co-SiO2 composite films is affected by the exchange coupling fluctuations.

  Info
Periodical
Solid State Phenomena (Volumes 168-169)
Main Theme
Edited by
V. Ustinov
Pages
265-268
DOI
10.4028/www.scientific.net/SSP.168-169.265
Citation
E. A. Denisova, R. S. Iskhakov, S.V. Stolyar, S.V. Komogortsev, L.A. Chekanova, V.K. Maltsev, Y. Kalinin, A.V. Sitnikov, "Exchange Interaction in the Co-SiO2 Nanocomposite Films", Solid State Phenomena, Vols. 168-169, pp. 265-268, 2011
Online since
December 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Rauf S. Iskhakov, S.V. Stolyar, V. Y. Yakovchuk, M. V. Chizhik
VIII. Magnetism of Nanostructures
Abstract:FMR and SWR spectra of exchange-coupled structures NiFe/Cu/NiFe, NiFe/Ag/NiFe and NiFe/DyCo/NiFe have been investigated. We revealed that the...
459
Authors: O.A. Goncharova, L.A. Chekanova, E.A. Denisova, S.V. Komogortsev, Rauf S. Iskhakov, E.V. Eremin
VIII. Magnetism of Nanostructures
Abstract:Powders of Ñî-Ð alloy with ultradispersed corundum (Al2O3) and detonation nanodiamond (DND) precipitates were...
470
Authors: A.I. Dmitriev, O.V. Koplak, R.B. Morgunov
IX. Diluted Magnetic Semiconductors
Abstract:Magnetic properties of a GaAs-based heterostructures containing InGaAs quantum well and 2 nm thick GaAs layer doped with 5 at. % Mn (GaAs:Mn)...
550
Authors: Igor V. Bychkov, Vasiliy D. Buchelnikov, D.A. Kuzmin, V.V. Shadrin
IV. Multiferroics
Abstract:The spectrum of coupling spin and electromagnetic waves for magnetic having spiral magnetic structure defined by non-uniform exchange and...
257
Authors: Ke Tang
Chapter 2: Nano and Micro Devices and Systems
Abstract:Micromagnetic simulation is performed on a ferromagnetic nanoparticle with lateral gradient magnetization in order to study its resonance...
113