High-resolution imaging of fast magnetization dynamics in magnetic nanostructures

Stoll, Hermann; Puzic, Aleksander; van Waeyenberge, Bartel; Fischer, Peter; Raabe, Joerg; Buess, Matthias; Haug, Thomas; Höllinger, Rainer; Back, Christian; Weiss, Dieter; Denbeaux, Gregory
April 2004
Applied Physics Letters;4/26/2004, Vol. 84 Issue 17, p3328
Academic Journal
By combining magnetic transmission x-ray microscopy with a stroboscopic pump and probe technique using synchrotron radiation we are able to image the magnetization dynamics in micron sized magnetic particles on a sub-100 ps time scale with a lateral spatial resolution down to 21 nm. We report first observations in squared elements indicating locally varying precessional frequencies which are in agreement with micromagnetic simulations. The experiment opens a route towards a high spatiotemporal resolution of spin patterns which is needed to understand the microscopic origin of magnetization reversal of micron sized and nano-sized magnetic particles. © 2004 American Institute of Physics.


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