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- Title
Influence of variation of tungsten layer thickness on interfacial Dzyaloshinskii–Moriya interaction in W/CoFeB/SiO<sub>2</sub> heterostructures.
- Authors
Chaurasiya, Avinash Kumar; Sinha, Jaivardhan; Choudhury, Samiran; Barman, Anjan
- Abstract
Interfacial Dzyaloshinskii–Moriya interaction (IDMI) is crucial for stabilizing skyrmions and chiral domain walls, which are expected to play key roles in the development of advanced spintronics-based devices. Using Brillouin light scattering spectroscopy, we have directly measured the W-layer thickness-dependent IDMI in technologically important W(t)/CoFeB/SiO2 heterostructures in the range 1 nm ≤ t ≤ 7 nm. Due to the presence of IDMI, a pronounced asymmetry is observed in the peak intensity, frequency and linewidth of the spin-wave spectra in the Damon-Eshbach geometry. Our study reveals that IDMI energy density increases monotonically for 1 nm ≤ t ≤ 5 nm, beyond which it decreases sharply, while its sign always remains negative. This remarkable variation of IDMI energy density is explained in the light of the thickness-dependent structural phase transition of W.
- Publication
Bulletin of Materials Science, 2021, Vol 44, Issue 1, p1
- ISSN
0250-4707
- Publication type
Article
- DOI
10.1007/s12034-021-02589-x