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MA: Fachverband Magnetismus
MA 16: Magnetic characterization techniques
MA 16.1: Vortrag
Dienstag, 13. März 2018, 09:30–09:45, H 0112
Nanoscale magneto-optical imaging using a compact extreme-UV source based on high-harmonic generation — •Sergey Zayko1, Ofer Kfir1,2, Michael Heigl3, Christina Nolte1, Murat Sivis1, Marcel Möller1, Birgit Hebler3, Sri Sai Phani Kanth Arekapudi3, Daniel Steil1, Sascha Schäfer1, Oren Cohen2, Stefan Mathias1, Manfred Albrecht3, and Claus Ropers1 — 1University of Göttingen, Germany — 2Physics Department, Technion, Israel Institute of Technology, Israel — 3Institute of Physics, University of Augsburg, Germany
Magnetic topological excitations such as domain walls or skyrmions are of great importance for fundamental research and applied science [1,2]. High-harmonic generation offers an exciting possibility to study such physical phenomena at their characteristic nanometre spatial and femtosecond temporal scales using a compact experimental setup [3]. Here, we demonstrate the first results on magnetic imaging with high-harmonic radiation. By using circularly polarized harmonics [4], we access XMCD contrast from nanoscale magnetic domains and obtain quantitative, diffraction-limited absorption and phase images with sub-50 nm spatial resolution. These results open the way towards comprehensive magneto-optical studies with unprecedented spatio-temporal resolution on a table top.
[1] Allwood et al., Science 309, Issue 5741, pp. 1688-1692. (2005)
[2] Mühlbauer et al., Science 323, Issue 5916, pp. 915-919 (2011)
[3] Kfir, Zayko et al., in press.
[4] Fleischer et al.,Nat. Photonics 8, 543-549 (2014)