Journal Article

FZJ-2024-06006

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spin Spiral State at a Ferromagnetic Gd Vacuum Interface

Härtl, P. (Corresponding author) ; Vogt, M. ; Leisegang, M.FZJ* ; Bihlmayer, G.FZJ* ; Blügel, S.FZJ* ; Bode, M.

2024
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.133.186701  doi:10.34734/FZJ-2024-06006

Abstract: Centrosymmetric bulk magnets made of layered Gd intermetallics had been discovered recently to exhibit helical spin spirals with a wavelength of ≈2  nm that transform into skyrmion lattices at certain magnetic fields. Here we report on the observation of a spin spiral state at the Gd(0001) surface. Spin-polarized scanning tunneling microscopy images show striped regions with a periodicity of about 2 nm. These stripes rearrange upon application of an external magnetic field, thereby unambiguously confirming their magnetic origin. Density functional theory calculations explain that competing exchange interactions in the surface layer of Gd(0001) together with a magnetovolume fine-tuning of the exchange interaction to the next Gd layer favor a chiral 2 nm conical spin spiral at the surface, arising as a general behavior of the Gd monolayer.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)
2. SFB 1238 C01 - Strukturinversionsasymmetrische Materie und Spin-Orbit-Phänomene mittels ab initio (C01) (319898210) (319898210)
3. DFG project G:(GEPRIS)390858490 - EXC 2147: Komplexität und Topologie in Quantenmaterialien (CT.QMAT) (390858490) (390858490)
4. DFG project G:(GEPRIS)510676484 - Spinstruktur dünner Seltenerdmetall-Filme (510676484) (510676484)

Appears in the scientific report 2024

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