Direct Observation of Fe-Ge Ordering in Fe5-xGeTe2 Crystals and Resultant Helimagnetism

Cited 3 time in webofscience Cited 0 time in scopus
  • Hit : 96
  • Download : 0
Microscopic structures and magnetic properties are investigated for Fe5-xGeTe2 single crystal, recently discovered as a promising van der Waals (vdW) ferromagnet. An Fe atom (Fe(1)) located in the outermost Fe5Ge sublayer has two possible split-sites which are either above or below the Ge atom. Scanning tunneling microscopy shows root 3 x root 3 superstructures which are attributed to the ordering of Fe(1) layer. The root 3 x root 3 superstructures have two different phases due to the symmetry of Fe(1) ordering. Intriguingly, the observed root 3 x root 3 ordering breaks the inversion symmetry of crystal, resulting in substantial antisymmetric exchange interaction. The temperature dependence of magnetization reveals a sharp magnetic anomaly suggesting helical magnetism of the Fe5-xGeTe2 due to its non-centrosymmetricity. Analytical study also supports that the observed ordering can give rise to the helimagnetism. The work will provide essential information to understand the complex magnetic properties and the origin of the new vdW ferromagnet, Fe5-xGeTe2 for future topology-based spin devices.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2021-04
Language
English
Article Type
Article
Citation

ADVANCED FUNCTIONAL MATERIALS, v.31, no.17, pp.2009758

ISSN
1616-301X
DOI
10.1002/adfm.202009758
URI
http://hdl.handle.net/10203/282819
Appears in Collection
PH-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 3 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0