Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 31: Poster II
MA 31.23: Poster
Wednesday, March 19, 2025, 17:00–19:30, P1
Low-temperature XPEEM to study functional properties of magnetic 2D materials — •Shubhada Patil1, Alevtina Smekhova2, and Florian Kronast3 — 1Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany — 2Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany — 3Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany
Two-dimensional (2D) magnetic van der Waals materials are particularly promising for electronic and spintronic devices. They exhibit novel electronic and magnetic properties that are ideally suited for investigation with surface-sensitive X-ray photoemission electron microscopy (XMCD-PEEM). In this poster, the experimental capabilities of the low-temperature PEEM facility at BESSY II are presented, including the possibility to study responses to optical excitations of a femtosecond laser system.
The results presented will focus on investigations of the magnetic properties of 2D heterostructures prepared by mechanical exfoliation of FexGeTe2 crystals (x=3, 4 or 5) with a thickness of up to a few monolayers on gold-coated Si/SiO2 substrates with h-BN capping layer in an inert atmosphere. Element-specific low-temperature imaging in XPEEM with a special sample environment is used to identify the magnetic domain configurations and their dynamic response to optical excitation with fs laser pulses.
Keywords: 2d materials; mechanical exfoliation; Fe3GeTe2; XPEEM; Fe5GeTe2