Effect of Ga composition on the static and dynamic magnetic properties of Fe100-xGax films (18.5 ≤ x ≤ 33.4)
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.
- Publication:
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Journal of Magnetism and Magnetic Materials
- Pub Date:
- October 2019
- DOI:
- 10.1016/j.jmmm.2019.165323
- Bibcode:
- 2019JMMM..48765323E
- Keywords:
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- Fe-Ga film;
- Magnetization dynamics;
- Saturation magnetostriction;
- In-plane damping constant;
- Perpendicular damping constant