Effect of doping elements on the damping constant of (Ni-Fe 1- xM x (M=Ga, Ag, Mo, and W) films

Yasushi Endo, Yoshio Mitsuzuka, Yutaka Shimada, Masahiro Yamaguchi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


This paper describes the relationship between the damping constant α and saturation magnetostriction λ s of (Ni-Fe1-xM x (M=Ga, Ag, Mo, and W; 0\,<!xleq \,0.10) films to clarify the effect of doping elements on α and other magnetic properties in these films. For M=Ga and Ag, the change of α with x is closely related with that of λ s, while it is not consistent with that of λ s when M= Mo and W. These results suggest that both α and λ s are correlated with each other as the single fcc Ni-Fe phase remains unchanged with x for M=Ag and Ga, while that α and λ s are independent from each other because of coexistence of fcc Ni-Fe and new phases when M=Mo and W. Therefore, it is pointed out that α can be controlled effectively by selecting the doping elements which do not induce a new phase in the Ni-Fe binary alloy, but one should be careful about a change in magnetoelastic properties which may deteriorate magnetic softness. These results for M=Ga and Ag also suggests that (Ni-Fe1-xM x films are good examples to give evidence that the magnetoelastic energy E \sigma has the same intrinsic origin with α.

Original languageEnglish
Article number6332691
Pages (from-to)3390-3393
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number11
Publication statusPublished - 2012


  • damping constant
  • fcc-Ni-Fe phase
  • saturation magnetostriction


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