TY  - JOUR
AU  - Schmitt, Maurice
AU  - Denneulin, Thibaud
AU  - Kovács, András
AU  - Saunderson, Tom G.
AU  - Rüßmann, Philipp
AU  - Shahee, Aga
AU  - Scholz, Tanja
AU  - Tavabi, Amir H.
AU  - Gradhand, Martin
AU  - Mavropoulos, Phivos
AU  - Lotsch, Bettina V.
AU  - Dunin-Borkowski, Rafal E.
AU  - Mokrousov, Yuriy
AU  - Blügel, Stefan
AU  - Kläui, Mathias
TI  - Skyrmionic spin structures in layered Fe5GeTe2 up to room temperature
JO  - Communications Physics
VL  - 5
IS  - 1
SN  - 2399-3650
CY  - London
PB  - Springer Nature
M1  - FZJ-2022-03727
SP  - 254
PY  - 2022
AB  - The role of the crystal lattice, temperature and magnetic field for the spin structure formation in the 2D van der Waals magnet Fe5GeTe2 with magnetic ordering up to room temperature is a key open question. Using Lorentz transmission electron microscopy, we experimentally observe topological spin structures up to room temperature in the metastable pre-cooling and stable post-cooling phase of Fe5GeTe2. Over wide temperature and field ranges, skyrmionic magnetic bubbles form without preferred chirality, which is indicative of centrosymmetry. These skyrmions can be observed even in the absence of external fields. To understand the complex magnetic order in Fe5GeTe2, we compare macroscopic magnetometry characterization results with microscopic density functional theory and spin-model calculations. Our results show that even up to room temperature, topological spin structures can be stabilized in centrosymmetric van der Waals magnets.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000869843200001
DO  - DOI:10.1038/s42005-022-01031-w
UR  - https://juser.fz-juelich.de/record/910285
ER  -