Tuning magnon spectra via interlayer coupling in pseudo-3D nanostructured artificial spin ice arrays

de Rojas, Julius; Atkinson, Del; Adeyeye, Adekunle O.

Abstract

We have investigated the static and dynamic behavior of “pseudo-3D” trilayer square artificial spin ice structures. The trilayer stack comprises of two ferromagnetic Ni81Fe19 (Permalloy, Py) layers with 30 and 70 nm thickness, separated by a nonmagnetic copper layer of varying thickness from 2 to 40 nm. We show that the copper thickness enables interlayer coupling between layers to be finely controlled, leading to bespoke magnetization states and resonance spectra tuning. Our results demonstrate a further route to control the interaction in artificial spin ices beyond planar structures, enabling tunable magnetization dynamics, a potentially programmable degree of freedom for magnonic and microwave devices.

Citation

de Rojas, J., Atkinson, D., & Adeyeye, A. O. (2023). Tuning magnon spectra via interlayer coupling in pseudo-3D nanostructured artificial spin ice arrays. Applied Physics Letters, 123(23), Article 232407. https://doi.org/10.1063/5.0177447

• Journal Article Type: Article
• Acceptance Date: Nov 18, 2023
• Online Publication Date: Dec 8, 2023
• Publication Date: Dec 4, 2023
• Deposit Date: Jan 22, 2024
• Publicly Available Date: Jan 22, 2024
• Journal: Applied Physics Letters
• Print ISSN: 0003-6951
• Electronic ISSN: 1077-3118
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 123
• Issue: 23
• Article Number: 232407
• DOI: https://doi.org/10.1063/5.0177447
• Keywords: Physics and Astronomy (miscellaneous)
• Public URL: https://durham-repository.worktribe.com/output/2161054