Thickness dependence of the effective damping in epitaxial Fe 3O4/MgO thin films

S. Serrano-Guisan; Wu Han-Chun; C. Boothman; M. Abid; B. S. Chun; I. V. Shvets; H. W. Schumacher

doi:10.1063/1.3531989

Thickness dependence of the effective damping in epitaxial Fe ₃O₄/MgO thin films

S. Serrano-Guisan, Wu Han-Chun, C. Boothman, M. Abid^*, B. S. Chun, I. V. Shvets, H. W. Schumacher

^*此作品的通讯作者

科研成果: 期刊稿件 › 文章 › 同行评审

29 引用（Scopus）

摘要

The precessional magnetization dynamics of high quality epitaxial magnetite (Fe₃O₄) thin films growth on MgO are investigated by inductive magnetization dynamic measurements in time and frequency domain. An upper bound for the intrinsic Gilbert damping parameter of α₀ =0.037±0.001 is derived, which is significantly lower than previously reported for epitaxial Fe₃O₄ on GaAs. With increasing film thickness from 5 up to 100 nm a strong increase in the effective damping up to 0.2 is observed which cannot be explained by simple nonuniform spin wave excitations. Possible origins of this effect are discussed.

源语言	英语
文章编号	013907
期刊	Journal of Applied Physics
卷	109
期	1
DOI	https://doi.org/10.1063/1.3531989
出版状态	已出版 - 1 1月 2011
已对外发布	是

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Serrano-Guisan, S., Han-Chun, W., Boothman, C., Abid, M., Chun, B. S., Shvets, I. V., & Schumacher, H. W. (2011). Thickness dependence of the effective damping in epitaxial Fe ₃O₄/MgO thin films. Journal of Applied Physics, 109(1), 文章 013907. https://doi.org/10.1063/1.3531989

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AU - Serrano-Guisan, S.

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AU - Abid, M.

AU - Chun, B. S.

AU - Shvets, I. V.

AU - Schumacher, H. W.

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N2 - The precessional magnetization dynamics of high quality epitaxial magnetite (Fe3O4) thin films growth on MgO are investigated by inductive magnetization dynamic measurements in time and frequency domain. An upper bound for the intrinsic Gilbert damping parameter of α0 =0.037±0.001 is derived, which is significantly lower than previously reported for epitaxial Fe3O4 on GaAs. With increasing film thickness from 5 up to 100 nm a strong increase in the effective damping up to 0.2 is observed which cannot be explained by simple nonuniform spin wave excitations. Possible origins of this effect are discussed.

AB - The precessional magnetization dynamics of high quality epitaxial magnetite (Fe3O4) thin films growth on MgO are investigated by inductive magnetization dynamic measurements in time and frequency domain. An upper bound for the intrinsic Gilbert damping parameter of α0 =0.037±0.001 is derived, which is significantly lower than previously reported for epitaxial Fe3O4 on GaAs. With increasing film thickness from 5 up to 100 nm a strong increase in the effective damping up to 0.2 is observed which cannot be explained by simple nonuniform spin wave excitations. Possible origins of this effect are discussed.

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Thickness dependence of the effective damping in epitaxial Fe 3O4/MgO thin films

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Thickness dependence of the effective damping in epitaxial Fe ₃O₄/MgO thin films