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.

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., Kuświk, P., & 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
• Public URL: https://durham-repository.worktribe.com/output/1236537