Imaging Nucleation and Propagation of Pinned Domains in Few-Layer Fe 5- x GeTe 2 .

Autor: Högen M; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, United Kingdom., Fujita R; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, United Kingdom., Tan AKC; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, United Kingdom.; Department of Physics, Imperial College, London, SW7 2AZ, United Kingdom., Geim A; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, United Kingdom., Pitts M; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, United Kingdom., Li Z; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China., Guo Y; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China., Stefan L; Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, 2100 Copenhagen, Denmark., Hesjedal T; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, United Kingdom., Atatüre M; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, United Kingdom.
Jazyk: angličtina
Zdroj: ACS nano [ACS Nano] 2023 Sep 12; Vol. 17 (17), pp. 16879-16885. Date of Electronic Publication: 2023 Aug 29.
DOI: 10.1021/acsnano.3c03825
Abstrakt: Engineering nontrivial spin textures in magnetic van der Waals materials is highly desirable for spintronic applications based on hybrid heterostructures. The recent observation of labyrinth and bubble domains in the near room-temperature ferromagnet Fe 5- x GeTe 2 down to a bilayer thickness was thus a significant advancement toward van der Waals-based many-body physics. However, the physical mechanism responsible for stabilizing these domains remains unclear and requires further investigation. Here, we combine cryogenic scanning diamond quantum magnetometry and field reversal techniques to elucidate the high-field propagation and nucleation of bubble domains in trilayer Fe 5- x GeTe 2 . We provide evidence of pinning-induced nucleation of magnetic bubbles and further show an unexpectedly high layer-dependent coercive field. These measurements can be easily extended to a wide range of magnetic materials to provide valuable nanoscale insight into domain processes critical for spintronic applications.
Databáze: MEDLINE