Coexistence of Merons with Skyrmions in the Centrosymmetric Van Der Waals Ferromagnet Fe 5- x GeTe 2 .

Autor: Casas BW; National High Magnetic Field Laboratory, Tallahassee, FL, 32310, USA., Li Y; Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA., Moon A; National High Magnetic Field Laboratory, Tallahassee, FL, 32310, USA.; Department of Physics, Florida State University, Tallahassee, FL, 32306, USA., Xin Y; National High Magnetic Field Laboratory, Tallahassee, FL, 32310, USA., McKeever C; Institute for Condensed Matter and Complex Systems, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3FD, UK., Macy J; National High Magnetic Field Laboratory, Tallahassee, FL, 32310, USA.; Department of Physics, Florida State University, Tallahassee, FL, 32306, USA., Petford-Long AK; Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA.; Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA., Phatak CM; Materials Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA.; Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA., Santos EJG; Institute for Condensed Matter and Complex Systems, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3FD, UK.; Higgs Centre for Theoretical Physics, The University of Edinburgh, Edinburgh, EH9 3FD, UK.; Donostia International Physics Center (DIPC), 20018, Donostia-San Sebastián, Basque Country, Spain., Choi ES; National High Magnetic Field Laboratory, Tallahassee, FL, 32310, USA.; Department of Physics, Florida State University, Tallahassee, FL, 32306, USA., Balicas L; National High Magnetic Field Laboratory, Tallahassee, FL, 32310, USA.; Department of Physics, Florida State University, Tallahassee, FL, 32306, USA.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2023 Apr; Vol. 35 (17), pp. e2212087. Date of Electronic Publication: 2023 Mar 16.
DOI: 10.1002/adma.202212087
Abstrakt: Fe 5- x GeTe 2 is a centrosymmetric, layered van der Waals (vdW) ferromagnet that displays Curie temperatures T c (270-330 K) that are within the useful range for spintronic applications. However, little is known about the interplay between its topological spin textures (e.g., merons, skyrmions) with technologically relevant transport properties such as the topological Hall effect (THE) or topological thermal transport. Here, via high-resolution Lorentz transmission electron microscopy, it is shown that merons and anti-meron pairs coexist with Néel skyrmions in Fe 5- x GeTe 2 over a wide range of temperatures and probe their effects on thermal and electrical transport. A THE is detected, even at room T, that senses merons at higher T's, as well as their coexistence with skyrmions as T is lowered, indicating an on-demand thermally driven formation of either type of spin texture. Remarkably, an unconventional THE is also observed in absence of Lorentz force, and it is attributed to the interaction between charge carriers and magnetic field-induced chiral spin textures. These results expose Fe 5-x GeTe 2 as a promising candidate for the development of applications in skyrmionics/meronics due to the interplay between distinct but coexisting topological magnetic textures and unconventional transport of charge/heat carriers.
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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