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.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)