Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Magnetism Poster A

MA 15.9: Poster

Dienstag, 2. April 2019, 10:00–13:00, Poster E

Dipolar stabilized bubble-like skyrmions in Fe/Gd multilayers — •Michael Heigl¹, Zahra Inanloo Maranloo¹, Henrik Gabold², Peter Böni², and Manfred Albrecht² — ¹Experimental Physics IV, Institute of Physics, University of Augsburg, 86159 Augsburg, Germany — ²Physics Department E13, Technical University of Munich, 85748 Garching, Germany

Magnetic skyrmions are topologically nontrivial chiral spin textures. Most skyrmionic structures studied in today’s research are stabilized by the Dzyaloshinskii-Moriya interaction. In this work, we present a topologically similar spin structure stabilized by the competition of long-range dipolar energy in a thin film and domain wall energy. These chiral bubbles can be also described as dipolar stabilized skyrmions. [1]
We studied highly tunable ferrimagnetic multilayers consisting of Fe, Co and Gd. The layer structures with up to 80 bilayer repetitions are known for forming dipolar stabilized skyrmions [2]. They were magnetron sputtered at room temperature with each layer being thinner than 0.5 nm. We investigated dependent on composition, strain, field and temperature the formation of skyrmions and skyrmion lattices by SQUID magnetometry, magnetic force and lorentz transmission electron microscopy.
References:
N. Nagaosa and Y. Tokura, Nat. Nanotech. 8, 899 (2013).
S. A. Montoya et. al., Phys. Rev. B 95, 024415 (2017).