TY - JOUR
T1 - Effect of Ga composition on the static and dynamic magnetic properties of Fe100- xGax films (18.5 ≤ x ≤ 33.4)
AU - Endo, Yasushi
AU - Kawabe, Yasuyuki
AU - Miyazaki, Takamichi
AU - Shimada, Yutaka
N1 - Funding Information:
This work was supported in part by JSPS KAKENHI Grant Number JP17H03226. This work was supported in part by CIES collaborative research from CIES, Tohoku University. This work was also supported in part by the Murata Science Foundation and Advanced Storage Research Consortium (ASRC) in Japan.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - 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.
AB - 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.
KW - Fe-Ga film
KW - In-plane damping constant
KW - Magnetization dynamics
KW - Perpendicular damping constant
KW - Saturation magnetostriction
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U2 - 10.1016/j.jmmm.2019.165323
DO - 10.1016/j.jmmm.2019.165323
M3 - Article
AN - SCOPUS:85066444463
SN - 0304-8853
VL - 487
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 165323
ER -