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 language | English |
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Pages (from-to) | 293-294 |
Number of pages | 2 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 272-276 |
Issue number | I |
DOIs | |
Publication status | Published - 2004 May |
Keywords
- FMR
- Gilbert damping
- Precession
- Reversal
- Tunnel junction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics