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Molecular Foundry

HIGHLIGHTSCreation of Skyrmions in van der Waals ferromagnet Fe3GeTe2
September 20, 2020

Scientific Achievement

Néel-type skyrmions observed by Lorentz TEM in the system of Fe3GeTe2/[Co/Pd]10 multilayers. The magnetization distribution was obtained by exit wave phase reconstruction of the LTEM image. The white arrows and the color wheel indicate the in-plane direction of the magnetization.

Realized topological Skyrmions in van der Waals (vdW) ferromagnetic materials.

Significance and Impact

Opens a new avenue to vdW magnet-based topological spintronics such as the zero-field skyrmion motion in vdW ferromagnets.

Research Details

  • Magnetic Skyrmions usually exist in materials with inversion symmetry-breaking, which a-priori excludes vdW magnetic materials (e.g., Fe3GeTe2) as hosts for magnetic Skyrmion.
  • Realized Skyrmions in vdW Fe3GeTe2 within zero magnetic field by coupling Fe3GeTe2 with out-of-plane magnetized (Co/Pd) multilayers,
  • Identified the Neel-type topological structure of these Skyrmions.
M. Yang, Q. Li, R. V. Chopdekar, R. Dhall, J. Turner, J. D. Carlstroem, C. Ophus,  C. Klewe, P. Shafer, A. T. N’Diaye, J. W. Choi, G. Chen, Y. Z. Wu, C. Hwang, F. Wang, and Z. Q. Qiu, Sci. Adv. 6, eabb5157 (2020).

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