Inhomogeneous magnon scattering during ultrafast demagnetization

R. Knut, E. K. Delczeg-Czirjak, S. Jana +20

Ni${}_{0.8}$Fe${}_{0.2}$ (Py) and Py alloyed with Cu exhibit intriguing ultrafast demagnetization behavior, where the Ni magnetic moment shows a delayed response relative to the Fe, an…