Science Advances

Supplementary Materials

The PDF file includes:

  • Fig. S1. Occurrence frequency distribution of femtosecond laser pulse–induced magnetic structures in a circular Py disk at a fluence of 16 mJ/cm2.
  • Fig. S2. Occurrence frequency distribution of femtosecond laser pulse–induced magnetic structures in a square Py disk at a fluence of 16 mJ/cm2.
  • Fig. S3. Occurrence frequency distribution of femtosecond laser pulse–induced magnetic structures in a triangular Py disk at a fluence of 16 mJ/cm2.
  • Fig. S4. Schematic of relative change to the sum of demagnetization and exchange energies associated with the transformation of the indicated state to a lower-energy state estimated by application of a magnetic field applied along the ±x or ±y directions, whichever is lowest.
  • Fig. S5. Typical magnetic structures in triangular Py disks (edge length of 1.7 μm) determined by micromagnetic simulation to show the pinning sites at the disk edge.
  • Fig. S6. Annular bright-field images of a circular Py disk after a femtosecond laser pulse quenching with different fluences to show the change of the inside crystallites.
  • Legends for movies S1 to S13

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Other Supplementary Material for this manuscript includes the following:

  • Movie S1 (.avi format). Fresnel imaging of femtosecond laser pulse quenching–induced magnetic structure change in a circular Py disk (diameter of 3 μm) at a fluence of 12 mJ/cm2.
  • Movie S2 (.avi format). Fresnel imaging of femtosecond laser pulse quenching–induced magnetic structure change in a square Py disk (edge length of 3 μm) at a fluence of 12 mJ/cm2.
  • Movie S3 (.avi format). Fresnel imaging of femtosecond laser pulse quenching–induced magnetic structure change in a triangular Py disk (edge length of 1.7 μm) at a fluence of 12 mJ/cm2.
  • Movie S4 (.avi format). Fresnel imaging of femtosecond laser pulse quenching–induced magnetic structure change in a circular Py disk (diameter of 1.7 μm) at a fluence of 12 mJ/cm2.
  • Movie S5 (.avi format). Micromagnetic simulation on the magnetization relaxation dynamics of the formation of a single magnetic vortex structure in the triangular Py disk (edge length of 1.7 μm) after a femtosecond pulse quenching (fluence of 12 mJ/cm2).
  • Movie S6 (.avi format). Micromagnetic simulation on the magnetization relaxation dynamics of the formation of a magnetic structure with two magnetic vortices in the triangular Py disk (edge length of 1.7 μm) after a femtosecond pulse quenching (fluence of 12 mJ/cm2).
  • Movie S7 (.avi format). Micromagnetic simulation on the magnetization relaxation dynamics of the formation of a magnetic structure with three magnetic vortices in the triangular Py disk (diameter of 3.0 μm) after a femtosecond pulse quenching (fluence of 12 mJ/cm2).
  • Movie S8 (.avi format). Micromagnetic simulation on the magnetization relaxation dynamics of the formation of a single magnetic vortex structure in the circular Py disk (diameter of 3.0 μm) after a femtosecond pulse quenching (fluence of 12 mJ/cm2).
  • Movie S9 (.avi format). Micromagnetic simulation on the magnetization relaxation dynamics of the formation of a magnetic structure with four magnetic vortices in the circular Py disk (diameter of 3.0 μm) after a femtosecond pulse quenching (fluence of 12 mJ/cm2).
  • Movie S10 (.avi format). Micromagnetic simulation on the magnetization relaxation dynamics of the formation of a magnetic structure with four magnetic vortices in the circular Py disk (diameter of 3.0 μm) after a femtosecond pulse quenching (fluence of 12 mJ/cm2).
  • Movie S11 (.avi format). Micromagnetic simulation on the magnetization relaxation dynamics of the formation of a single magnetic vortex structure in the square Py disk (edge length of 3 μm) after a femtosecond pulse quenching (fluence of 12 mJ/cm2).
  • Movie S12 (.avi format). Micromagnetic simulation on the magnetization relaxation dynamics of the formation of a magnetic structure with three magnetic vortices in the square Py disk (edge length of 3 μm) after a femtosecond pulse quenching (fluence of 12 mJ/cm2).
  • Movie S13 (.avi format). Micromagnetic simulation on the magnetization relaxation dynamics of the formation of a magnetic structure with four magnetic vortices in the square Py disk (edge length of 3 μm) after a femtosecond pulse quenching (fluence of 12 mJ/cm2).

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