Magnetization dynamics in CoFeB buffered perpendicularly magnetized Co/Pd multilayer

E. P. Sajitha, Jakob Walowski, D. Watanabe, S. Mizukami, Feng Wu, Hiroshi Naganuma, Mikihito Oogane, Yasuo Ando, T. Miyazaki

研究成果: Article査読

20 被引用数 (Scopus)


The magnetic properties of CoFeB buffered [Co(0.3 nm)/Pd(x nm)]6 multilayer films have been investigated. It is found that the magnetic properties of the multilayer depended on the Pd thickness and for thickness below 0.5 nm no perperdicular anisotropy is observed. Magnetization dynamics in perpendicularly magnetized CoFeB-[Co/Pd] multilayer films are investigated using time-resolved magneto-optical Kerr effect (TRMOKE). The variation of precession frequency with external magnetic field for different palladium thickness is quantitatively understood using the macrospin approximation of the Landau-Lifshitz-Gilbert equation of motion. The Gilbert damping constant α, in the range 0.040.1, varying with the palladium thickness is reported. The observed α value is comparable to the damping coefficient of bulk Ni, and much lower than the reported values for perpendicularly magnetized films. The CoFeB buffer layer with in-plane anisotropy appears to significantly affect the precession frequency and thus the damping constant of the films.

ジャーナルIEEE Transactions on Magnetics
出版ステータスPublished - 2010 6月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 電子工学および電気工学


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