Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 80: Poster: Scanning Probe Techniques - Method Development
O 80.11: Poster
Mittwoch, 14. März 2018, 18:15–20:30, Poster A
Measuring Single Iron Magnetic State Lifetimes Using Distortion Compensated Signals — •Gregory McMurtrie1,2,3, Max Hänze2,3, Steffen Rolf-Pissarczyk2,3, Luigi Malavolti2,3, Mohammad Abdo2,3, Björn Schlie1,2,3, and Sebastian Loth1,2,3 — 1Institute for Functional Matter and Quantum Technologies, Stuttgart, Germany — 2Max Planck Institute for Structure and Dynamics of Matter, Hamburg, Germany — 3Max Planck Institute for Solid State Research, Stuttgart, Germany
Injecting pulses [1] or continuous wave signals [2] into a tunnel junction has shown promising results for the characterization of fast magnetic surface dynamics using scanning tunneling microscopy. When pushing into the sub-nanosecond time domain, the transmission line characteristics of the instrument strongly modify the signals reaching the tunnel junction [3], limiting the effective time resolution. We present an in-situ technique for the quantitative measurement of the transmission line characteristics, both in phase and amplitude. This information is used to compensate for imperfections in the transmission lines, resulting in a greatly increased effective bandwidth. By improving the time resolution of the instrument, it becomes possible to measure spin relaxation times of individual atoms which are often well under a nanosecond. The door is now opened to further implement the pulse correction technique and observe a wide range of ultra-fast phenomena at the atomic scale. [1] S. Loth, et. al. Science 329 1628 (2010). [2] S. Baumann et. al. Science 350 6259 (2015) [3] C. Grosse, et. al. Appl. Phys. Lett. (2013)