N. V. Ostrovskaya

Research Institute of Physical Problems F.V. Lukin, Moskva, Moscow, Russia

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Publications (5)3.62 Total impact

  • N. V. Ostrovskaya · A. F. Popkov
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    ABSTRACT: Self-localized domain wall (DW) oscillations in a uniaxial ferromagnet in the presence of dissipation and a periodic homogeneous magnetic field are under investigation. On the basis of perturbation theory and the direct numerical solution of magnetodynamic equations, the stabilization conditions of soliton-like domain wall oscillations have been found. For a given frequency of pumping field, the narrow range of field magnitude, where the effects of self-organization on the domain wall appear, has been discovered. The threshold of the external field amplitude, when the generation of Bloch lines in the domain wall starts, has been obtained approximately. Such generation is the initial stage of chaotization of the domain wall under the parametric pump, which has been observed in the numerical experiments.
    No preview · Article · Nov 1996 · Radio Science
  • YK Fetisov · N. V. Ostrovskaya · AF Popkov
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    ABSTRACT: The theory describing parametrical interaction of magnetostatic backward volume waves (MSBVW) in a space‐time periodic magnetic field was developed. Forward and backward scattering of MSBVW propagating in a 20‐μm‐thick yttrium‐iron‐garnet film at a central frequency of 3 GHz was observed. A space‐time periodic magnetic field with a spatial period of 500 μm, a frequency in the range 20–150 MHz, and a magnitude up to 10 Oe was created by ac current passing through a meander line placed on the film surface. An interaction bandwidth of 20 MHz and an efficiency of up to 10% have been obtained in accordance with theoretical predictions. © 1996 American Institute of Physics.
    No preview · Article · May 1996 · Journal of Applied Physics
  • A. F. Popkov · N. V. Ostrovskaya · L. L. Savchenko

    No preview · Conference Paper · Jan 1996
  • A. F. Popkov · A. V. Medved · N. V. Ostrovskaya · R. G. Kryshtal
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    ABSTRACT: Possibility of using magnetostatic wave scattering by a surface acoustic wave for transformation of impulse signal time scale is considered. Processes of parametric transformation of magnetostatic waves by a modulated surface acoustic wave in linear regime are studied. Influence of the acoustic pumping and the pulse duration on evolution the signal and the transformed impulse shapes as well as influence of dissipation on impulse scattering processes are analyzed.
    No preview · Article · May 1994
  • N.V. Ostrovskaya · A.F. Popkov · V.P. Romanov
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    ABSTRACT: Numerical solution of the Landau-Lifshitz equation system combined with analytical methods of asymptotic analysis of solutions in the vicinity of the system equilibrium state was applied for determining the range of stability to longitudinal disturbances of a basic state on the quality factor - external magnetic field surface. Dynamics of nonequilibrous initial shape of domains was presented with the help of direct numerical solution of the equations mentioned. Critical magnetic field for remagnetization nucleus collapse was found to decrease with quality factor Q increase. Calculated results agree well with the data earlier obtained by variational techniques, especially for Q>2.4.
    No preview · Article · Jan 1992

Publication Stats

13 Citations
3.62 Total Impact Points

Institutions

  • 1996
    • Research Institute of Physical Problems F.V. Lukin
      Moskva, Moscow, Russia
    • Moscow Institute of Electronic Technology
      Moskva, Moscow, Russia