Time-resolved magnetization precession and reversal dynamics investigated using tunneling current and Kerr effect

Y. Ando, H. Nakamura, S. Mizukami, H. Kubota, T. Miyazaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Magnetization precession and reversal dynamics in permalloy (Py) layer was studied using ns-time-scale spin-polarized tunneling current probing and ps-time-scale Kerr microscopy. In the time-resolved magneto-optical Kerr effect measurement, the precessional frequency increased with increasing external static field. The signal was fitted well with the calculation using Landau-Lifshitz-Gilbert equation of motion with the damping parameter α of 0.008, which corresponded to the value obtained for the film measured using a ferromagnetic resonance.

Original languageEnglish
Pages (from-to)293-294
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberI
DOIs
Publication statusPublished - 2004 May

Keywords

  • FMR
  • Gilbert damping
  • Precession
  • Reversal
  • Tunnel junction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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