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Proximity induced magnetism and the enhancement of damping in ferromagnetic/heavy metal systems

Swindells, C.; Głowiński, H.; Choi, Y.; Haskel, D.; Michałowski, P.P.; Hase, T.; Kuświk, P.; Atkinson, D.

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Authors

C. Swindells

H. Głowiński

Y. Choi

D. Haskel

P.P. Michałowski

T. Hase

P. Kuświk



Abstract

The relationship between proximity induced magnetism (PIM) at the heavy metal/ferromagnet interface and spin-transport across such interfaces has generated significant debate. To investigate the link between the two, element specific X-ray magnetic circular dichroism and ferromagnetic resonance measurements were made on the same CoFe/Au/Pt and NiFe/Au/Pt thin film samples with varying Au thickness, with complementary SIMS analysis, which shows evidence of Ni diffusion from NiFe into the Pt. An approximately linear relationship is observed between the magnitude of Pt PIM and magnitude of damping enhancement in both systems. The results demonstrate that electronic hybridization of the heavy metal and ferromagnet is required for a full understanding of damping enhancement and interfacial spin-transport for spintronic devices.

Citation

Swindells, C., Głowiński, H., Choi, Y., Haskel, D., Michałowski, P., Hase, T., …Atkinson, D. (2021). Proximity induced magnetism and the enhancement of damping in ferromagnetic/heavy metal systems. Applied Physics Letters, 119(15), Article 152401. https://doi.org/10.1063/5.0064336

Journal Article Type Article
Acceptance Date Sep 29, 2021
Online Publication Date Oct 11, 2021
Publication Date Oct 11, 2021
Deposit Date Oct 11, 2021
Publicly Available Date Oct 11, 2021
Journal AIP Applied Physics Letters
Print ISSN 0003-6951
Electronic ISSN 1077-3118
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 119
Issue 15
Article Number 152401
DOI https://doi.org/10.1063/5.0064336

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Copyright Statement
© 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://
creativecommons.org/licenses/by/4.0/).






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