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Автор(ы) : Denisova E. A., Komogortsev S. V., Iskhakov R. S., Chekanova L. A., Kalinin Yu. E., Sitnikov A. V.
Заглавие : Spin-wave spectroscopy and magnetostructural studies of Co nanogranular composites
Коллективы : International Symposium on Physics of Materials
Место публикации : Acta Phys. Pol. A. - 2018. - Vol. 134: Proceedings of International Symposium on Physics of Materials (ISPMA 14), Is. 3. - P.623-626. - ISSN 0587-4246, DOI 10.12693/APhysPolA.134.623. - ISSN 1898-794X eISSN
Примечания : Cited References: 25. - This work was supported by RFBR grants nos. 16-03-00256, 16-03-00969.
Предметные рубрики: Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances
Spin-wave resonance
Magnetic anisotropy
Аннотация: Nanogranular Co-SiO2, and Co-CaF2 films are investigated using ferromagnetic resonance and magnetic measurements. The spectrum of standing spin-wave has been registered in the perpendicular experiment configuration for all types of films with the magnetic granules content above 52 vol.%. The dependences of resonance fields Hr of spin modes on the mode number squared Hr(n2) are non-linear. Such behavior is supposed to be the result of the fluctuations of magnetic parameters (the magnetization and the ferromagnetic exchange coupling) in nanocomposite films. A comparison between the magnetic properties of Co-SiO2 granular films and Co-CaF2 films is carried out. The surface anisotropy value Ks of Co-SiO2 films is evaluated from the surface resonance modes of spin-wave resonance spectra as 3.5×10-4s7×10-4 J/m2. The magnetic anisotropy of Co100-x(SiO2)x, Co100-x(CaF2)x films (34s and the surface magnetic anisotropy of films Ks are determined. It is found that surface anisotropy of granules is predominant.
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