Brillouin light scattering from spin waves in Co100-xCrx alloy films

Akira Yoshihara, Hidekuni Sato, Jun Ichi Mawatari, Kazuetsu Yoshida, Osamu Kitakami, Yutaka Shimada

研究成果: Article

16 引用 (Scopus)

抜粋

Collective spin waves in Co100-xCrx alloy films (x = 0, 9.2, 15.7 and 35.2 in at%) of 300±5 angstroms in thickness have been studied by means of Brillouin light scattering (BLS) at room temperature in magnetic fields of up to 4.0 kOe. Except for the Co64.8Cr35.2 film, we observed scattering from spin waves and determined the spin wave stiffness constant DB. We obtained a value of DB = (3.47±0.35)×10-9 Oe cm2 (436±44 meV angstroms2) for pure Co. Although this value is in good agreement with recent BLS values, it is rather smaller than the value of 510 meV angstroms2 obtained from neutron scattering. For the alloys, the DB value at x = 15.7 is strongly reduced to approximately 1/4 of the value at x = 9.2, while the saturation magnetization decreases almost linearly as the Cr content increases. We discuss this DB behavior in terms of the Cr segregation which takes a place for Cr contents above x to approximately 12.

元の言語English
ページ(範囲)261-267
ページ数7
ジャーナルJournal of Magnetism and Magnetic Materials
221
発行部数3
DOI
出版物ステータスPublished - 2000 11

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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  • これを引用

    Yoshihara, A., Sato, H., Mawatari, J. I., Yoshida, K., Kitakami, O., & Shimada, Y. (2000). Brillouin light scattering from spin waves in Co100-xCrx alloy films. Journal of Magnetism and Magnetic Materials, 221(3), 261-267. https://doi.org/10.1016/S0304-8853(00)00495-9