학술논문
Ultrafast Opto-magnetic Effects in the Extreme Ultraviolet Spectral Range
Document Type
Working Paper
Author
Hennecke, Martin; Schmising, Clemens von Korff; Yao, Kelvin; Jal, Emmanuelle; Vodungbo, Boris; Chardonnet, Valentin; Légaré, Katherine; Capotondi, Flavio; Naumenko, Denys; Pedersoli, Emanuele; Lopez-Quintas, Ignacio; Nikolov, Ivaylo P.; Raimondi, Lorenzo; De Ninno, Giovanni; Salemi, Leandro; Ruta, Sergiu; Chantrell, Roy; Ostler, Thomas; Pfau, Bastian; Engel, Dieter; Oppeneer, Peter M.; Eisebitt, Stefan; Radu, Ilie
Source
Subject
Language
Abstract
Coherent light-matter interactions mediated by opto-magnetic phenomena like the inverse Faraday effect (IFE) are expected to provide a non-thermal pathway for ultrafast manipulation of magnetism on timescales as short as the excitation pulse itself. As the IFE scales with the spin-orbit coupling strength of the involved electronic states, photo-exciting the strongly spin-orbit coupled core-level electrons in magnetic materials appears as an appealing method to transiently generate large opto-magnetic moments. Here, we investigate this scenario in a ferrimagnetic GdFeCo alloy by using intense and circularly polarized pulses of extreme ultraviolet radiation. Our results reveal ultrafast and strong helicity-dependent magnetic effects which are in line with the characteristic fingerprints of an IFE, corroborated by ab initio opto-magnetic IFE theory and atomistic spin dynamics simulations.