Title :
Correlation Between Saturation Magnetostriction and Damping Constant in
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Author :
Endo, Yuta ; Mitsuzuka, Y. ; Okawa, Kazuya ; Shimada, Yusuke ; Yamaguchi, Masaki
Author_Institution :
Dept. of Electr. & Commun. Eng., Tohoku Univ., Sendai, Japan
Abstract :
This paper describes our experimental investigation on a correlation between saturation magnetostriction and damping constant in 50-nm-thick (Ni-Fe)1-xMx (M=Pt , Au, Pd, and Cr; 0 <; x <; 0.12) films. The change in a with x is closely related with that of λs for every M: when M=Pt , Au, and Pd, a decreases almost monotonically with increasing λs, while it increases in (Ni-Fe)1-xCrx films. These results give clear evidence that a correlates with λs in (Ni-Fe)1-xMx films. These results also reveal that a can be controlled effectively by transition metal dopants. In addition, it should be pointed out that when adjusting a of magnetically soft films, particular attention must be paid to considerable change of magnetoelastic properties that leads to deterioration of magnetic softness.
Keywords :
damping; iron compounds; magnetic thin films; magnetoelastic effects; magnetostriction; nickel compounds; (Ni-Fe)1-xAux; (Ni-Fe)1-xCrx; (Ni-Fe)1-xPdx; (Ni-Fe)1-xPtx; damping constant; magnetic softness deterioration; magnetically soft films; magnetoelastic properties; saturation magnetostriction; transition metal dopants; Damping; Gold; Magnetic resonance; Magnetostriction; Saturation magnetization; Coplanar waveguide (CPW) FMR; Ni–Fe film; damping constant; saturation magnetostriction;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2158081