Measurement of magnetization precession for NM/Ni80Fe 20/NM (NM = Cu and Pt) using time-resolved Kerr effect

Hiroaki Nakamura, Yasuo Ando, Shigemi Mizukami, Hitoshi Kubota, Terunobu Miyazaki

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4 Citations (Scopus)

Abstract

Magnetization precession of NM/Ni80Fe20/NM (NM = Cu and Pt) multilayers was measured by the time-resolved magneto-optical Kerr effect (MOKE). A MOKE measurement system equipped with a pulse laser and optical delay lines was set up and samples were combined using a photoconductive switch for pulse field generation. Clear oscillation and relaxation of the magnetization of motion in time domain were successfully observed. Gilbert damping constant α for Cu/Ni80Fe20/Cu multilayers was independent of the thickness of Ni80Fe20. While α for Pt/Ni80Fe20/Pt multilayers was enhanced as Ni80Fe20 layer became thinner. These experimental data were well fitted by LLG calculation with the same α obtained by ferromagnetic resonance (FMR).

Original languageEnglish
Pages (from-to)L787-L789
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume43
Issue number6 B
Publication statusPublished - 2004 Jun 15

Keywords

  • Gilbert damping constant
  • Magnetic dynamics
  • Magnetization precession
  • Ni Fe
  • Pump-probe
  • Time-resolved Kerr effect

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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