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Damping in magnetization dynamics of single-crystal Fe3O4/GaN thin films

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JournalJournal of Applied Physics
DatePublished - 1 Apr 2011
Issue number7
Number of pages3
Pages (from-to)1-3
Original languageEnglish


The time-resolved magnetization dynamics of epitaxial Fe3O4 thin films grown on GaN(100) was studied using a field pumped time-resolved magneto-optical Kerr (TRMOKE) setup. The dynamic responses of the magnetization in the 3 and 6 nm Fe3O4/GaN films under a 1 kOe magnetic field pulse were measured and compared to a macrospin Landau-Lifshitz-Gilbert (LLG) simulation. The anisotropy constants of the two systems have been estimated and the damping constant has been extracted by applying different bias field along two orthogonal directions. This work provides a first TRMOKE study of thickness and frequency dependence of damping in single crystal Fe3O4/GaN systems. (C) 2011 American Institute of Physics. [doi:10.1063/1.3563058]

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