Collective spin waves in RKKY interlayer-coupled Ni 80 Fe 20 /Ru/Ni 80 Fe 20 nanowire arrays

Adeyeye, Adekunle O; Hussain, Bushra; Cottam, Michael G; Gubbiotti, Gianluca

Abstract

We report on a comprehensive investigation of collective spin waves in Ruderman–Kittel–Kasuya–Yosida (RKKY) interlayer-coupled Ni80Fe20 (10 nm)/Ru(1.0 nm)/ Ni80Fe20 (10 nm) nanowire (NW) arrays. We employed Brillouin light scattering to probe the field- and wavevector-dependences of the spin-wave frequency spectra. The acquired data were subsequently analyzed and interpreted within the framework of a microscopic Hamiltonian-based method, enabling a detailed understanding of the observed spin-wave behavior. We observed the propagation of Bloch-type collective spin waves within the arrays, characterized by distinct magnonic bandwidths that stem from the combined influence of RKKY interlayer and inter-NW dynamical dipolar interactions.

Citation

Adeyeye, A. O., Hussain, B., Cottam, M. G., & Gubbiotti, G. (2024). Collective spin waves in RKKY interlayer-coupled Ni 80 Fe 20 /Ru/Ni 80 Fe 20 nanowire arrays. Journal of Physics: Condensed Matter, 36(39), Article 395801. https://doi.org/10.1088/1361-648x/ad5923

• Journal Article Type: Article
• Acceptance Date: Jun 17, 2024
• Online Publication Date: Jun 28, 2024
• Publication Date: Oct 2, 2024
• Deposit Date: Jul 3, 2024
• Publicly Available Date: Jul 3, 2024
• Journal: Journal of Physics: Condensed Matter
• Print ISSN: 0953-8984
• Electronic ISSN: 1361-648X
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 36
• Issue: 39
• Article Number: 395801
• DOI: https://doi.org/10.1088/1361-648x/ad5923
• Keywords: Brillouin light scattering, spin dynamics, interlayer exchange coupling, spin waves, RKKY, magnetic nanowires
• Public URL: https://durham-repository.worktribe.com/output/2505483