Ultrafast magnetoacoustics in nickel films.

  title={Ultrafast magnetoacoustics in nickel films.},
  author={Ji-Wan Kim and Mircea Vomir and Jean-Yves Bigot},
  journal={Physical review letters},
  volume={109 16},
We report about the magnetization dynamics of a ferromagnetic nickel film at room temperature excited by acoustic pulses generated with femtosecond laser pulses. The ultrafast change of magnetization is detected from both the front and back sides of the nickel film. The propagating strain associated with the acoustic pulses modifies the magnetic anisotropy and induces a precession of the magnetization. We model the time-dependent magnetoacoustic response of the metallic film by combining a… 

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