Domain wall dynamics and interlayer interactions in magnetic trilayer systems studied by XMCD-PEEM

Jan Vogel (1) , Wolfgang Kuch (2) , Keiki Fukumoto (2) , Fabien Romanens , Stefania Pizzini (1) , Julio Camarero (3)

1 NEEL - MNM - Micro et NanoMagnétisme
2 FU BERLIN - Institut für Experimentalphysik
3 FMC - Departamento de Fisica de la Materia Condensada [Madrid]

We have used time-resolved x-ray magnetic circular dichroism combined with photoemission electron microscopy (XMCD-PEEM) to investigate the layer-resolved microscopic magnetization reversal in FeNi/X/Co (with X = Cu, Al2O3) trilayer systems. These measurements were performed in pump-probe mode, synchronizing magnetic pulses with synchrotron x-ray pulses. The good magnetic contrast observed for most samples reveals that in many cases the magnetization reversal is reproducible. We have used the measurements to obtain domain wall propagation speeds as a function of applied magnetic field, and to investigate the influence of domain wall interactions on the magnetic switching.

Mots clés: Magnetic Tunnel Junctions; Spin valves; XMCD; Domain wall; Magnetostatic Effects; PEEM; Magnetization Dynamics

Domaines: Autre [cond-mat.other]

Jan Vogel, Wolfgang Kuch, Keiki Fukumoto, Fabien Romanens, Stefania Pizzini, et al.. Domain wall dynamics and interlayer interactions in magnetic trilayer systems studied by XMCD-PEEM. Applied physics. A, Materials science & processing, 2008, 92, pp.505. ⟨10.1007/s00339-008-4550-y⟩. ⟨hal-00308532⟩