SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Magnetic Imaging Techniques II
MA 43.6: Vortrag
Donnerstag, 30. März 2023, 16:15–16:30, HSZ 401
Coherent Correlation Imaging for resolving fluctuating states of matter — •Christopher Klose1, Felix Buettner2,3,4, Wen Hu3, Claudio Mazzoli3, Kai Litzius2, Riccardo Battistelli4, Ivan Lemesh2, Jason M. Bartell2, Mantao Huang2, Christian M. Guenther5, Michael Schneider1, Andi Barbour3, Stuart B. Wilkins3, Geoffrey S.D. Beach2, Stefan Eisebitt1,5, and Bastian Pfau1 — 1Max Born Institute, Berlin — 2Massachusetts Institute of Technology, Cambridge, MA, USA — 3National Synchrotron Light Source II, Upton, NY, USA — 4Helmholtz-Zentrum Berlin — 5Technische Universitaet Berlin
Fluctuations and stochastic transitions are ubiquitous in nanometer-scale systems, especially in the presence of disorder. However, their direct observation has so far been impeded by a seemingly fundamental, signal-limited compromise between spatial and temporal resolution.
Here, we develop coherent correlation imaging (CCI) --- a high-resolution, full-field imaging technique that realizes multi-shot, time-resolved imaging of stochastic processes. The key of CCI is the classification of camera frames that correspond to the same physical state by combining a correlation-based similarity metric with powerful classification algorithm developed for genome research.
We apply CCI to study previously inaccessible magnetic fluctuations in a highly degenerate magnetic stripe domain state with nanometer-scale resolution. The spatiotemporal imaging reveals the transition network between the states and details of the magnetic pinning landscape which have been inaccessible so far.