Localization of Fe d-states in Ni-Fe-Cu alloys and implications for ultrafast demagnetization

Ronny Knut, Erna K. Delczeg-Czirjak, Justin M. Shaw +11

Ni${}_{80}$Fe${}_{20}$ (Py) and Py-Cu exhibit intriguing ultrafast demagnetization behavior, where the Ni magnetic moment shows a delayed response relative to the Fe [S. Mathias et al.…