Effect of Film Thickness on the High Frequency Magnetic Properties of Polycrystalline Fe-Ga Films

Yasushi Endo, Takumi Sakai, Takamichi Miyazaki, Yutaka Shimada

研究成果: Article査読

4 被引用数 (Scopus)

抄録

This paper describes the effect of film thickness on the high frequency magnetic properties of polycrystalline Fe-Ga films. The damping constant (α) increases markedly from approximately 0.015 to 0.081 for a film thickness below 20 nm, reaches a maximum value of 0.084 at a thickness of 30 nm, and then decreases to 0.068 as the thickness further increases to 100 nm. All the values are much larger than those of a single crystal Fe-Ga film, indicating that the extrinsic damping overlaps with the intrinsic damping. The inhomogeneous broadening in a zero field [ΔH (0)] significantly increases with the film thickness due to the magnetic inhomogeneities, such as anisotropy dispersion and other effects. In addition, α increases markedly as the saturation magnetostriction (λs) increases. This behavior is very similar to those of Ni-Fe and Ni-Fe-M films. Therefore, these results demonstrate that α is correlated with λs regardless of the film thickness, and also sensitive to magnetic inhomogeneities.

本文言語English
論文番号7924417
ジャーナルIEEE Transactions on Magnetics
53
11
DOI
出版ステータスPublished - 2017 11

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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