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 language | English |
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Pages (from-to) | L787-L789 |
Journal | Japanese Journal of Applied Physics, Part 2: Letters |
Volume | 43 |
Issue number | 6 B |
DOIs | |
Publication status | Published - 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(all)