Damping of magnetization precession in perpendicularly magnetized CoFeB alloy thin films

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Abstract

Gilbert damping is investigated in perpendicularly magnetized CoFeB thin films using ferromagnetic resonance and time-resolved magneto-optical Kerr effect. The CoFeB films were deposited on a MgO layer and annealed at different temperatures. The lowest effective damping constant α eff values were 0.017, 0.013, and 0.009 for the films annealed at 250, 300, and 350 °C, respectively; these values were smaller than the values reported previously.

Original languageEnglish
Article number083001
JournalApplied Physics Express
Volume5
Issue number8
DOIs
Publication statusPublished - 2012 Aug

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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