Presentation	2010-12-10 Study on the damping constant of magnetic thin film using a coplanar waveguide (CPW)-ferromagnetic resonance (FMR) measurement method Yasushi ENDO, Yoshi MITSUZUKA, Kohei OKAWA, Yutaka SHIMADA, Masahiro YAMAGUCHI,
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Abstract(in English)	This paper reports the study on the damping constants (α) of Ni_xFe_<1-x> (0.65M_y (M=Pt, Au, Pd, Cr; 0 films, α slightly decreases for 0.67M_y films, both α and |λ_s| linearly increases with increasing y. Furthermore, the increments of α and the absolute value of λ_s (|λ_s|) to y are markedly enhanced in the order of M = Pt, Au, Pd, and Cr suggesting that 5d transition metal dopants are more influential on bothα and λ_s, than 3d and 4d transition metal dopants due to the strong spin-orbit interaction. Based on these results, it is speculated that the dominant factor of α in Ni_xFe_<1-x> and (Ni-Fe)_<1-x>M_x films is themagnetoelastic energy (E_σ). These results also demonstrate that α can be controlled effectively through the change in E_σ by transition metal dopants.
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Keyword(in English)	CPW-FMR measurement / Ni-Fe films / Damping constant (α) / Saturation magnetostriction (λ_s) / Transition metal dopants
Paper #	MR2010-49
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Committee	MR
Conference Date	2010/12/2(1days)
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Paper Information
Registration To	Magnetic Recording (MR)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Study on the damping constant of magnetic thin film using a coplanar waveguide (CPW)-ferromagnetic resonance (FMR) measurement method
Sub Title (in English)
Keyword(1)	CPW-FMR measurement
Keyword(2)	Ni-Fe films
Keyword(3)	Damping constant (α)
Keyword(4)	Saturation magnetostriction (λ_s)
Keyword(5)	Transition metal dopants
1st Author's Name	Yasushi ENDO
1st Author's Affiliation	Graduate School of Engineering, Tohoku University()
2nd Author's Name	Yoshi MITSUZUKA
2nd Author's Affiliation	Graduate School of Engineering, Tohoku University
3rd Author's Name	Kohei OKAWA
3rd Author's Affiliation	Graduate School of Engineering, Tohoku University
4th Author's Name	Yutaka SHIMADA
4th Author's Affiliation	Graduate School of Engineering, Tohoku University
5th Author's Name	Masahiro YAMAGUCHI
5th Author's Affiliation	Graduate School of Engineering, Tohoku University
Date	2010-12-10
Paper #	MR2010-49
Volume (vol)	vol.110
Number (no)	329
Page	pp.pp.-
#Pages	8
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