Determination of Penetration Depth of Transverse Spin Current in Ferromagnetic Metals by Spin Pumping

Tomohiro Taniguchi; Satoshi Yakata; Hiroshi Imamura; Yasuo Ando

doi:10.1143/APEX.1.031302

Determination of Penetration Depth of Transverse Spin Current in Ferromagnetic Metals by Spin Pumping

Mesoscale and Nanoscale Physics 2015-05-13 v3 Other Condensed Matter

Authors: Tomohiro Taniguchi , Satoshi Yakata , Hiroshi Imamura , Yasuo Ando

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Abstract

Spin pumping in nonmagnetic/ferromagnetic metal multilayers is studied both theoretically and experimentally. We show that the line widths of the ferromagnetic resonance (FMR) spectrum depend on the thickness of the ferromagnetic metal layers, which must not be in resonance with the oscillating magnetic field. We also show that the penetration depths of the transverse spin current in ferromagnetic metals can be determined by analyzing the line widths of their FMR spectra. The obtained penetration depths in NiFe, CoFe and CoFeB were 3.7 [nm], 2.5 [nm] and 12.0 [nm], respectively.

Keywords

spin pumping transverse spin current penetration depth ferromagnetic metals ferromagnetic resonance FMR spectrum line width

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@article{arxiv.0708.3528,
  title  = {Determination of Penetration Depth of Transverse Spin Current in Ferromagnetic Metals by Spin Pumping},
  author = {Tomohiro Taniguchi and Satoshi Yakata and Hiroshi Imamura and Yasuo Ando},
  journal= {arXiv preprint arXiv:0708.3528},
  year   = {2015}
}

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4 pages, 2 figures,

Determination of Penetration Depth of Transverse Spin Current in Ferromagnetic Metals by Spin Pumping

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