Regensburg 2016 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 7: SKM Dissertation-Prize 2016
DY 7.4: Hauptvortrag
Montag, 7. März 2016, 11:45–12:10, H2
Imaging Spin Textures on Curved Magnetic Surfaces — •Robert Streubel1,2, Peter Fischer1,3, Florian Kronast4, Oliver G. Schmidt1, and Denys Makarov1,5 — 1Institute for Integrative Nanosciences, IFW Dresden, Dresden, Germany — 2Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, USA — 3Physics Department, UC Santa Cruz, Santa Cruz, USA — 4Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin, Germany — 5Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany
Extending 2D structures into the third dimension allows for modifying conventional or for launching novel functionalities. A proper characterization of 3D magnetic objects demands tomographic imaging reconstructing the magnetization vector field. State-of-the-art techniques, i.e. magnetic neutron tomography and vector field electron tomography, provide means to investigate macroscopic and nanoscopic samples; An characterization of mesoscopic specimens is not possible, yet highly demanded.
The main objective of the thesis was to develop a visualization technique that provides nanometer spatial resolution to image magnetic domain patterns on extended 3D curved surfaces. The proposed and realized concept of magnetic soft X- ray tomography (MXT), based on the X-ray magnetic circular dichroism (XMCD) effect with soft X-ray microscopies, is demonstrated by reconstructing the magnetic domain patterns on 3D curved surfaces resembling hollow cylindrical objects.