Optimization of Time-Resolved Magneto-optical Kerr Effect Signals for Magnetization Dynamics Measurements

  • Authors:
    Dustin M. Lattery (Univ. of Minnesota), Delin Zhang (Univ. of Minnesota), Jie Zhu (Univ. of Minnesota), Paul Crowell (Univ. of Minnesota), Jian-Ping Wang (Univ. of Minnesota), Xiaojia Wang (Univ. of Minnesota)
    Publication ID:
    P093320
    Publication Type:
    Paper
    Received Date:
    31-Mar-2018
    Last Edit Date:
    31-Mar-2018
    Research:
    2381.001 (Johns Hopkins University)
    2381.004 (University of Minnesota)

Abstract

Recently magnetic storage and magnetic memory have shifted towards the use of magnetic thin films with perpendicular magnetic anisotropy (PMA). Understanding the magnetic damping in these materials is crucial, but normal Ferromagnetic Resonance (FMR) measurements face some limitations. The desire to quantify the damping in materials with PMA has resulted in the adoption of Time-Resolved Magneto-optical Kerr Effect (TR-MOKE) measurements. In this paper, we discuss the angle and field dependent signals in TR-MOKE, and utilize a numerical algorithm based on the Landau-Lifshitz-Gilbert (LLG) equation to provide information on the optimal conditions to run TR-MOKE measurements.

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