Spin pumping in nanolayers of WS.sub.2./sub./Co.sub.2./sub.FeAl heterostructures: Large spin mixing conductance and spin transparency

0567150 - FZÚ 2023 RIV US eng J - Journal Article
Hait, S. - Gupta, N.K. - Sharma, N. - Pandey, L. - Kumar, N. - Barwal, V. - Kumar, Prabhat - Chaudhary, S.
Spin pumping in nanolayers of WS₂/Co₂FeAl heterostructures: Large spin mixing conductance and spin transparency.
Journal of Applied Physics. Roč. 132, č. 13 (2022), č. článku 133901. ISSN 0021-8979. E-ISSN 1089-7550
Institutional support: RVO:68378271
Keywords : spin pumping * heterostructures * large spin mixing conductance * spin transparency
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.2, year: 2022
Method of publishing: Limited access
https://doi.org/10.1063/5.0107655

Materials with high spin–orbit coupling (SOC) are a prerequisite for the realization of spin–orbit torque-based magnetic memories. Transition metal dichalcogenides (TMDs) are an apt choice for such applications due to their high SOC strength. In this work, we have investigated the spin pumping phenomenon at the interface between thin tungsten disulphide (WS2) films and Co2FeAl (CFA) Heusler alloy films by performing ferromagnetic resonance (FMR) measurements on WS2/CFA heterostructures capped with the 4 nm thin Al film. While Raman spectroscopy conclusively proves the number of monolayers in the WS2 films, atomic force microscopy and x-ray reflectivity measurements were used to quantify the smoothness of the grown interfaces (<0.4 nm) as well as the individual layer thicknesses in the heterostructure stacks. High-quality TMDs can be used as efficient materials for magnetic memory device applications.
Permanent Link: https://hdl.handle.net/11104/0338429