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.

doi:10.1063/5.0064336

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

Journal Article · Mon Oct 11 00:00:00 EDT 2021 · Applied Physics Letters

DOI:https://doi.org/10.1063/5.0064336· OSTI ID:1868995

^[1];

^[2];

^[3]; Haskel, D. ^[3]; Michałowski, P. P. ^[4];

^[5]; Kuświk, P. ^[2];

^[6]

Durham Univ. (United Kingdom); Univ. of Sheffield (United Kingdom)
Polish Academy of Sciences, Poznań (Poland)
Argonne National Lab. (ANL), Argonne, IL (United States)
Łukasiewicz Research Network—Inst. of Microelectronics and Photonics, Warsaw (Poland)
Univ. of Warwick, Coventry (United Kingdom)
Durham Univ. (United Kingdom)

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 spintransport for spintronic devices.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: Engineering and Physical Sciences Research Council (EPSRC); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Centre Poland

Grant/Contract Number:: AC02-06CH11357; 2019/33/B/ST5/02013

OSTI ID:: 1868995

Alternate ID(s):: OSTI ID: 1825200

Journal Information:: Applied Physics Letters, Vol. 119, Issue 15; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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