Effect of Ga composition on the static and dynamic magnetic properties of Fe100- xGax films (18.5 ≤ x ≤ 33.4)

Yasushi Endo, Yasuyuki Kawabe, Takamichi Miyazaki, Yutaka Shimada

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2 Citations (Scopus)

Abstract

This paper describes the effect of Ga composition (x) on the static and dynamic magnetic properties of 50-nm-thick Fe100- xGax films (18.5 ≤ x ≤ 33.4). The in-plane damping constant (α//), the perpendicular (out-of-plane) damping constant (α), the saturation magnetostriction (λs) and the maximum piezomagnetic coefficient ((dλ/dH)max) of these films are dependent on x, whereas the tendencies of α// and α for x are quite opposite to those of λs and (dλ/dH)max for x. For every x, the value of α// is much larger than that of α, suggesting that both the intrinsic damping and the extrinsic damping coexists in the in-plane dynamics of each Fe100- xGax film because of magnetic inhomogeneities such as two magnon scattering, anisotropy dispersion and so on. These results also demonstrate that only the intrinsic damping contributes to the out-of-plane dynamics of each Fe100- xGax film.

Original languageEnglish
Article number165323
JournalJournal of Magnetism and Magnetic Materials
Volume487
DOIs
Publication statusPublished - 2019 Oct 1

Keywords

  • Fe-Ga film
  • In-plane damping constant
  • Magnetization dynamics
  • Perpendicular damping constant
  • Saturation magnetostriction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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