| AVS 62nd International Symposium & Exhibition | |
| Novel Trends in Synchrotron and FEL-Based Analysis Focus Topic | Monday Sessions |
| Session SA-MoM |
| Session: | Imaging and Nanodiffraction (8:20-10:00 am) & Novel Insights in Correlated Materials, Organic Materials and 2D Solids (10:40 am -12:00 pm) |
| Presenter: | Gerhard Gruebel, Magnetic Dynamics, Germany |
| Correspondent: | Click to Email |
Ultrafast Dynamics in Magnetic Systems
Gerhard Grübel
DESY and The Hamburg Centre for Ultrafast Imaging (CUI)
Hamburg, Germany
Understanding ultrafast magnetization Dynamics on the nano-scale is a forefront problem in modern magnetism research with direct impact on the quest for faster and smaller storage devices. Probing the magnetization element-specifically and on the nanometer lenght-scale is a pre-requisite when probing technologically relevant material systems with complex composition.
X-ray free electron laser (FEL) sources with their unique properties delivering ultrashort and super intense soft X-ray pulses allow for the first time to address magnetization dynamics on the relevant time-and lenght scales.
We present recent results obtained on multi-domain Co/Pt magnetic multilayer samples with perpendicular magnetic anisotropy, pumped with short IR and THZ pulses. As a probe we use small angle X-ray scattering from the magnetic domains which, via X-ray magnetic circular dichroism at the Co M-edge, allows us to simultaneously obtain information on the magnitude of the local magnetization amd the characteristic lenght scale of the domains. The FEL sources FLASH at DESY (Hamburg) and FERMI at ELECTRA (Trieste) were used at a wavelenght of 20.8 nm corresponding to the CO M-edge.