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Research Highlight | Materials Science

Feeling the strain

In a study published in Advanced Functional Materials, researchers report the magnetic domain structures in Cr2Ge2Te6 using in-situ cryo-Lorentz transmission electron microscopy.

Scientific Achievement

Strain and topography are shown to control magnetic bubble lattices in a van der Waals ferromagnet.

Significance and Impact

Control of global topology and magnetic domain structures in 2D materials is of fundamental importance when creating multilayer heterostructures for potential devices or studies of novel interface physics

Research Details

  • Magnetic domain structures were observed in van der Waals Cr2Ge2Te6 (CGT) using in situ cryo-Lorentz transmission electron microscopy at temperatures as low as 12 K.
  • Exfoliated flakes were observed to support both topologically-protected and topologically-trivial bubble domains.
  • Magnetoelastic coupling between strain and the magnetization was observed in strained flakes, wherein bubble lattices and stripe domains aligned along the strain axis near the transition temperature, Tc.

DOI: 10.1002/adfm.202214203

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