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Interface enhanced precessional damping in spintronic multilayers: A perspective

Swindells, C.; Atkinson, D.

Interface enhanced precessional damping in spintronic multilayers: A perspective Thumbnail


Authors

C. Swindells



Abstract

In the past two decades, there have been huge developments in the understanding of damping in multilayered thin films and, more generally, in spin-transport in spintronic systems. In multilayered ferromagnetic (FM)/non-magnetic (NM) thin-film systems, observations of ferromagnetic resonant precession show a strong increase in the fundamental damping when the FM thin films are layered with heavy metals, such as Pt. These observations led to significant theoretical developments, dominated by the “spin-pumping” formalism, which describes the enhancement of damping in terms of the propagation or “pumping” of spin-current across the interface from the precessing magnetization into the heavy metal. This paper presents a perspective that introduces the key early experimental damping results in FM/NM systems and outlines the theoretical models developed to explain the enhanced damping observed in these systems. This is followed by a wider discussion of a range of experimental results in the context of the theoretical models, highlighting agreement between the theory and experiment, and more recent observations that have required further theoretical consideration, in particular, with respect to the role of the interfaces and proximity-induced magnetism in the heavy metal layer. The Perspective concludes with an outline discussion of spin-pumping in the broader context of spin-transport.

Citation

Swindells, C., & Atkinson, D. (2022). Interface enhanced precessional damping in spintronic multilayers: A perspective. Journal of Applied Physics, 131(17), Article 170902. https://doi.org/10.1063/5.0080267

Journal Article Type Article
Acceptance Date Apr 14, 2022
Online Publication Date May 2, 2022
Publication Date May 7, 2022
Deposit Date May 3, 2022
Publicly Available Date Mar 29, 2024
Journal Journal of Applied Physics
Print ISSN 0021-8979
Electronic ISSN 1089-7550
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 131
Issue 17
Article Number 170902
DOI https://doi.org/10.1063/5.0080267

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