Band structure evolution during the ultrafast ferromagnetic-paramagnetic phase transition in cobalt.

ABSTRACT: The evolution of the electronic band structure of the simple ferromagnets Fe, Co, and Ni during their well-known ferromagnetic-paramagnetic phase transition has been under debate for decades, with no clear and even contradicting experimental observations so far. Using time- and spin-resolved photoelectron spectroscopy, we can make a movie on how the electronic properties change in real time after excitation with an ultrashort laser pulse. This allows us to monitor large transient changes in the spin-resolved electronic band structure of cobalt for the first time. We show that the loss of magnetization is not only found around the Fermi level, where the states are affected by the laser excitation, but also reaches much deeper into the electronic bands. We find that the ferromagnetic-paramag

SUBMITTER: Eich S 

PROVIDER: S-EPMC5365247 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature