Gilbert damping in perpendicularly magnetized Pt/Co/Pt films investigated by all-optical pump-probe technique

S. Mizukami, E. P. Sajitha, D. Watanabe, F. Wu, T. Miyazaki, H. Naganuma, M. Oogane, Y. Ando

Research output: Contribution to journalArticlepeer-review

126 Citations (Scopus)

Abstract

To investigate the correlation between perpendicular magnetic anisotropy and intrinsic Gilbert damping, time-resolved magneto-optical Kerr effect was measured in Pt/Co (dCo) /Pt films. These films showed perpendicular magnetization at dCo =1.0 nm and a perpendicular magnetic anisotropy energy Kueff that was inversely proportional to d Co. With an analysis based on the Landau-Lifshitz-Gilbert equation, the intrinsic Gilbert damping constant α was evaluated by parameter-fitting of frequency and lifetime expressions to experimental data of angular variations in spin precession frequency and life-times. The α values increased significantly with decreasing dCo but not inversely proportional to dCo.

Original languageEnglish
Article number152502
JournalApplied Physics Letters
Volume96
Issue number15
DOIs
Publication statusPublished - 2010 Apr 12

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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