Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 18: Poster Focus Session Ultrafast Electron Microscopy at the Space-Time Limit
O 18.4: Poster
Monday, March 17, 2025, 18:00–20:00, P2
Towards the Investigation of Spin Systems With Electron Microscopy Tools — Antonín Jaroš1,2, Johann Toyfl1,2, Benjamin Czasch1,2, •Michael Stanislaus Seifner1,2, Isobel Claire Bicket1,2, and Philipp Haslinger1,2 — 1Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria — 2University Service Centre for Transmission Electron Microscopy, TU Wien, Stadionallee 2, 1020 Wien, Austria
Electron spin resonance (ESR) spectroscopy is a method for studying unpaired electrons in various samples with applications in medicine, biology, chemistry, and physics. Typically, the spatial resolution of classical ESR is limited to a few micrometers preventing studying spin systems and their dynamics at the atomic level. To obtain a better understanding of such dynamics, this project aims to develop an ESR setup inside a transmission electron microscope by using the magnetic field created by the objective lens of the microscope to generate energetically separated spin states. A specially designed microcoil integrated into a standard specimen holder allows for exciting spin systems, and various approaches for measuring the resulting resonances are presented. Our results point out potential ways of investigating spin dynamics with sub-nanometer spatial resolution and high temporal resolution. The developed setup will enrich the field of electron microscopy by providing a non-invasive tool to investigate spin systems as well as certain electron beam-induced sample damage.
Keywords: transmission electron microscopy; electron spin resonance; spin dynamics