Exchange interaction in the Co-SiO2 nanocomposite films

Описание

Тип публикации: статья из журнала (материалы конференций, опубликованные в журналах)

Год издания: 2011

Идентификатор DOI: 10.4028/www.scientific.net/SSP.168-169.265

Ключевые слова: Exchange coupling parameter, Ferromagnetic resonance, Granular composite films, Cobalt, Exchange coupling, Exchange interactions, Ferromagnetic materials, Ferromagnetic resonance, Ferromagnetism, Magnetic resonance measurement, Nanocomposite films, Nanocomposites, Nuclear magnetic resonance, Resonance, Silicon compounds, Spin waves, Cobalt, Exchange coupling, Exchange interactions, Ferromagnetic materials, Ferromagnetic resonance, Ferromagnetism, Magnetic resonance measurement, Magnetism, Nanocomposite films, Nuclear magnetic resonance, Spin fluctuations, Spin waves, Co content, Coupling parameters, Dispersion relations, Granular composite films, Magnetic measurements, Nanogranulars, NMR studies, Structural state, Granular composites, Nano-granular, Standing spin waves, Composite films, Composite films

Аннотация: 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 conПоказать полностьюstant 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.

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Издание

Выпуск журнала: Vol. 168-169

Номера страниц: 265-268

Авторы

  • Denisova E.A. (Kirensky Institute of Physics,SB,RAS)
  • Iskhakov R.S. (Kirensky Institute of Physics,SB,RAS)
  • Stolyar S.V. (Siberian Federal University)
  • Komogortsev S.V. (Siberian University of Technology)
  • Chekanova L.A. (Kirensky Institute of Physics,SB,RAS)
  • Maltsev V.K. (Kirensky Institute of Physics,SB,RAS)
  • Kalinin Y.E. (Voronezh State Technical University)
  • Sitnikov A.V. (Voronezh State Technical University)

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