Peng, Licong Yasin, Fehmi S. Park, Tae-Eon Kim, Sung Jong Zhang, Xichao Nagai, Takuro Kimoto, Koji Woo, Seonghoon Yu, Xiuzhen 2024-01-19T14:01:42Z 2024-01-19T14:01:42Z 2021-10-21 2021-09 1616-301X https://pubs.kist.re.kr/handle/201004/116548 The advent of ferromagnetism in 2D van der Waals (vdW) magnets has stimulated high interest in exploring topological magnetic textures, such as skyrmions for use in future skyrmion-based spintronic devices. To engineer skyrmions in vdW magnets by transforming Bloch-type magnetic bubbles into Neel-type skyrmions, a heavy metal/vdW magnetic thin film heterostructure has been made to induce interfacial Dzyaloshinskii-Moriya interaction (DMI). However, the unambiguous identification of the magnetic textures inherent to vdW magnets, for example, whether the magnetic twists (skyrmions/domain walls) are Neel- or Bloch-type, is unclear. Here we demonstrate that the magnetic twists can be tuned between Neel and Bloch-type in the vdW magnet Fe3GeTe2 (FGT) with/without interfacial DMI. We use an in-plane magnetic field to align the modulation wavevector q of the magnetizations in order to distinguish the Neel- or Bloch-type magnetic twists. We observe that q is perpendicular to the in-plane field in the heterostructure (Pt/oxidized-FGT/FGT/oxidized-FGT), while q aligns at a rotated angle with respect to the field direction in the FGT thin plate thinned from bulk. We find that the aligned domain wall twists hold fan-like modulations, coinciding qualitatively with our computational results. English WILEY-V C H VERLAG GMBH Tunable Neel-Bloch Magnetic Twists in Fe3GeTe2 with van der Waals Structure Article 10.1002/adfm.202103583 1 ADVANCED FUNCTIONAL MATERIALS, v.31, no.37, pp.2103583 - 2103583 ADVANCED FUNCTIONAL MATERIALS 31 37 2103583 2103583 scie scopus 000667809600001 2-s2.0-85108855410 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article SKYRMION PHASE Fe 3GeTe (2) magnetic skyrmion Neel-Bloch twists Van der Waals