Lorentz transmission electron microscopy investigation of magnetically patterned Co/Pt multilayers
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Lorentz transmission electron microscopy investigation of magnetically patterned Co/Pt multilayers

  • Author(s): Kusinski, G.J.
  • Krishnan, K.M.
  • Weller, D.
  • Terris, B.D.
  • Folks, L.
  • Kellock, A.J.
  • Baglin, J.E.E.
  • Thomas, G.
  • et al.
Abstract

The switching behavior of magnetic patterns prepared by ion irradiation was investigated. Co/Pt multilayers with perpendicular anisotropy and large out-of-plane coercivities 5-6 kOe were grown on electron transparent SiN windows. Regularly spaced 1 micron sized regions, were magnetically pattered via ion beam irradiation through a stencil mask. Lorentz TEM was used to observe in-situ magnetization reversal processes of irradiated regions under well-defined applied magnetic fields. When the in-plane field was increased, domain wall motion was observed, resulting in the alignment of the patterns with the direction of the applied field. The switching mechanism of the in-plane patterns was by domain wall motion.

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