Title:
Femtosecond Laser Excitation Drives Ferromagnetic Gadolinium out of Magnetic
Equilibrium
Author(s):
Carley, Robert Edward; Döbrich, Kristian; Frietsch, Björn; Gahl, Cornelius; Teichmann, Martin; Schwarzkopf, Olaf; Wernet, Philippe; Weinelt, Martin
Year of publication:
2012
Available Date:
2014-03-13T11:01:59.382Z
Abstract:
The temporal evolution of the exchange-split Δ2-like Σ valence bands of the
4f-ferromagnet gadolinium after femtosecond laser excitation has been studied
using angle-resolved photoelectron spectroscopy based on high-order harmonic
generation. The ultrafast drop of the exchange splitting reflects the magnetic
response seen in femtosecond magnetic dichroism experiments. However, while
the minority valence band reacts immediately, the response of the majority
counterpart is delayed by 1 picosecond and is only half as fast. These
findings demonstrate that laser excitation drives the valence band structure
out of magnetic equilibrium.
Part of Identifier:
ISSN (print): 0031-9007
DDC-Classification:
530 Physik
Publication Type:
Wissenschaftlicher Artikel
Also published in:
Physical Review Letters. - 109 (2012), 5, Artikel Nr. 057401/1-4
URL of the Original Publication:
DOI of the Original Publication:
Department/institution:
Physik
Institut für Experimentalphysik