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Magnetic damping in ferromagnetic/heavy-metal systems: The role of interfaces and the relation to proximity induced magnetism [dataset] Open Access

Damping and spin transport in spintronic multilayered systems continues to be a topic of active research. The enhancement of damping in ferromagnet(FM)/spacer layer (SL)/heavy metal (HM) thin-film systems was studied for Co25Fe75/SL/Pt with a non-magnetic (NM) SL of either Au or Cu with variable thickness, in order to understand the correlation with proximity induced magnetism (PIM) in the HM. Structural, PIM and magnetic damping measurements were undertaken on the same samples. Specifically, secondary ion mass spectroscopy (SIMS), element specific X-ray magnetic reflectivity and X-ray magnetic circular dichroism (XRMR, XMCD) at the Pt and Au L3 edges, and ferromagnetic resonance (FMR) methods were used. With increasing thickness of a Cu or Au SL directly between the FM and the Pt layer, the Pt PIM and the damping both fall rapidly, with a relationship between damping and PIM that depends on the SL material. The PIM observed in the Au layer showed a complex dependence on the layer thickness, suggesting some hybridisation with the Pt. The role of the number and location of interfaces on the damping was demonstrated with the addition of a SL within the Pt layer, which showed that the specific details of the NM/HM interface also affects the damping. The insertion of a Cu SL within the Pt showed a measurable increase in the overall enhancement of the damping while the insertion of a Au SL into Pt had almost no effect on the damping. Together these results demonstrate the role of both PIM and of additional interfaces in the enhancement of damping in FM/HM systems, which is not fully accounted for by existing theory

Descriptions

Resource type

Dataset

Contributors

Creator: Swindells,Charles ¹
Data collector: Swindells,Charles ¹
Editor: Swindells,Charles ¹

¹ Durham University

Funder

Engineering and Physical Sciences Research Council

Research methods

Synchrotron X rays Ferromagnetic Resonance Secondary Ion Mass Spectroscopy

Other description

Keyword

Spin Transport

Subject

Physics

Location

Language

Cited in

Identifier

ark:/32150/r1gm80hv40w
doi:10.15128/r1gm80hv40w

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

C.R. Swindells

Date Uploaded

4 March 2022, 12:03:47

Date Modified

4 March 2022, 14:03:04

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File format: zip (ZIP Format)

Mime type: application/zip

File size: 6673537

Last modified: 2022:03:04 12:29:11+00:00

Filename: Data_Long_Paper.zip

Original checksum: 716310a566e8b0f6ffd09c05d77619df