Domain Wall Spin Structures and Dynamics Probed by Synchrotron Techniques

摘要

Synchrotron-based magnetic imaging techniques have proven to be pow-erful for the investigation of geometrically confined magnetic domain walls and their dynamics due to the interaction with fields and spin-polarized currents. The application of different high resolution imaging techniques allows one to determine the nanoscale domain wall spin structures, which are comprehensively reviewed. Different domain wall types are observed depending on the materials and the geome-tries resulting from the interplay of the micromagnetic energy terms. When currents are injected into the nanostructures, the interaction between the spin-polarized charge carriers and the magnetization leads to current-induced domain wall motion due to the spin transfer torque effect, which is studied by direct imaging. Domain wall motion can be induced by field pulses, and imaging with sub-nanosecond time resolution of the domain wall dynamics is presented.