Work

Separation of bulk and surface contributions to the damping of permalloy on large-area chemical-vapor-deposited Mo S 2

Year: 2026

Type: article

Abstract: The ability to develop practical spintronic devices that use 2D van der Waals materials requires research on wafer-scale materials typically fabricated using chemical vapor deposition (CVD). In this report, we investigate spin pumping effects using ferromagnetic resonance spectroscopy (FMR) in wafer-scale transition-metal dichalcogenide–ferromagnetic (FM) heterostructures, specifically, Mo S 2 - Ni 0.8 Fe 0.2 bilayers with varying Ni 0.8 Fe 0.2 thicknesses. The FMR measurements allow the phenomenological damping parameter α of the FM layer to be determined, with increased values often attributed to injection of spins across an interface through spin pumping. Our results on sputtered Ni 0.8 Fe 0.2 ( t ) films deposited on monolayer and bilayer CVD-grown Mo S 2 show a lower contribution to α from surface effects than a film of the same thickness deposited on Si O 2 . A reduction in surface damping is often attributed to a drop in spin pumping, but this work demonstrates that other interfacial effects such as spin-memory loss must also be considered in determining the physical origin of the measured damping parameter.

Source: Physical Review Applied

DOI: 10.1103/wfsl-4mhb

Authors: Henry De Libero, Evelyn Chalmers, Noel Natera-Cordero, Andrew Strudwick, Ivan J. Vera-Marun, Thomas Thomson

Institution: University of Manchester

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: UK Research and Innovation, University of Manchester, Engineering and Physical Sciences Research Council

Award: G3348678696