Fast magnetization precession observed in L 10 -FePt epitaxial thin film

S. Mizukami; S. Iihama; N. Inami; T. Hiratsuka; G. Kim; H. Naganuma; M. Oogane; Y. Ando

doi:10.1063/1.3549704

Fast magnetization precession observed in L ₁₀ -FePt epitaxial thin film

S. Mizukami, S. Iihama, N. Inami, T. Hiratsuka, G. Kim, H. Naganuma, M. Oogane, Y. Ando

Tohoku University

Research output: Contribution to journal › Article › peer-review

95 Citations (Scopus)

Abstract

Fast magnetization precession is observed in L ₁₀ -FePt alloy epitaxial thin films excited and detected by all-optical means. The precession frequency varies from 45 to 65 GHz depending on the applied magnetic field strength and direction, which can be explained by a uniform precession model taking account of first- and second-order uniaxial magnetic anisotropy. The lowest effective Gilbert damping constant has a minimum value of 0.055, which is about half that in Co/Pt multilayers and is comparable to Ni/Co multilayers with perpendicular magnetic anisotropy.

Original language	English
Article number	052501
Journal	Applied Physics Letters
Volume	98
Issue number	5
DOIs	https://doi.org/10.1063/1.3549704
Publication status	Published - 2011 Jan 31

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abstract = "Fast magnetization precession is observed in L 10 -FePt alloy epitaxial thin films excited and detected by all-optical means. The precession frequency varies from 45 to 65 GHz depending on the applied magnetic field strength and direction, which can be explained by a uniform precession model taking account of first- and second-order uniaxial magnetic anisotropy. The lowest effective Gilbert damping constant has a minimum value of 0.055, which is about half that in Co/Pt multilayers and is comparable to Ni/Co multilayers with perpendicular magnetic anisotropy.",

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T1 - Fast magnetization precession observed in L 10 -FePt epitaxial thin film

AU - Mizukami, S.

AU - Iihama, S.

AU - Inami, N.

AU - Hiratsuka, T.

AU - Kim, G.

AU - Naganuma, H.

AU - Oogane, M.

AU - Ando, Y.

N1 - Funding Information: This work was partially supported by the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program) by JSPS and Grant-in-Aids for Scientific Research.

PY - 2011/1/31

Y1 - 2011/1/31

N2 - Fast magnetization precession is observed in L 10 -FePt alloy epitaxial thin films excited and detected by all-optical means. The precession frequency varies from 45 to 65 GHz depending on the applied magnetic field strength and direction, which can be explained by a uniform precession model taking account of first- and second-order uniaxial magnetic anisotropy. The lowest effective Gilbert damping constant has a minimum value of 0.055, which is about half that in Co/Pt multilayers and is comparable to Ni/Co multilayers with perpendicular magnetic anisotropy.

AB - Fast magnetization precession is observed in L 10 -FePt alloy epitaxial thin films excited and detected by all-optical means. The precession frequency varies from 45 to 65 GHz depending on the applied magnetic field strength and direction, which can be explained by a uniform precession model taking account of first- and second-order uniaxial magnetic anisotropy. The lowest effective Gilbert damping constant has a minimum value of 0.055, which is about half that in Co/Pt multilayers and is comparable to Ni/Co multilayers with perpendicular magnetic anisotropy.

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Fast magnetization precession observed in L ₁₀ -FePt epitaxial thin film

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