Illustrative TONIX Data on Permalloy Sample

The TONIX dataset showcases time-resolved, element-specific Kerr rotation and relative change of magnetization measurements conducted on a Ni80Fe20 permalloy sample. These measurements are presented as a function of both time and photon energy, providing valuable insights into the sample's magnetic behavior under various conditions.

a): element resolved relative change of the sample reflectivity as a function of time delay between the pump optical pulse and the FEL probe pulse.

b): element resolved Kerr rotation of the light polarization as a function of the photon energy (solid lines are guide to eye).

c): demagnetization signals at the Ni and Fe M23 edges.

d): element resolved unpumped magnetic hysteresis.