Modification of the magnetization dynamics of a NiFe nanodot due to thermal spin injection

Nagarjuna Asam, Kazuto Yamanoi, Takashi Kimura

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Abstract

An array of NiFe nanodots has been prepared on a Cu/CoFeAl film. Since a thermal spin current is expected to be excited owing to a large spin-dependent Seebeck coefficient for the CoFeAl, we investigate the magnetization dynamics of the NiFe dots under the temperature gradient along the vertical direction. By using vector network analyzer measurements, we have demonstrated that the temperature gradient produces modulations of the frequency of ferromagnetic resonance and the linewidth of the resonance spectra. The observed parabolic dependences are well explained by the damping-like and field-like components of spin transfer torque.

Original languageEnglish
Article number224004
JournalJournal of Physics D: Applied Physics
Volume51
Issue number22
DOIs
Publication statusPublished - May 10 2018

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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