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Field-Free Spin Hall Nano-Oscillators Based on Kagome Magnets

Project description

Kagome-based spin nano-oscillators for efficient field-free operation

Conventional spintronic nano-oscillators rely on heavy-metal spin-orbit torques and external magnetic fields, severely limiting their energy efficiency and scalability. Supported by the Marie Skłodowska-Curie Actions programme, the KaSHNO project develops energy-efficient, field-free spintronic nano-oscillators using Kagome materials as spin-current sources. It will begin with growth and optimisation of these materials, followed by device fabrication to quantify spin-orbit torques using spin torque ferromagnetic resonance and second harmonic Hall measurements. The materials will then be integrated into spin Hall nano-oscillators, where their dynamics will be studied electrically and optically via Brillouin light scattering. Overall, the project targets scalable, low-power oscillators for neuromorphic computing and microwave technologies.

Objective

Spin Hall nano-oscillators (SHNOs) have attracted considerable interest owing to their nanoscale dimensions, high operating frequencies, ultra-fast and wide frequency tunability, and potential as CMOS alternatives. Their operation relies on spin–orbit torque (SOT), which has been extensively explored in heavy metals. In contrast, Kagome materials host unique topological quantum features, such as 2D flat bands and Dirac-like surface states, offering a promising platform to study unconventional SOT phenomena. These properties are predicted to generate large, unconventional torques and enable voltage tunability, paving the way for energy-efficient, field-free SOT applications. Building on this potential, the KaSHNO project—Kagome-based Spin Hall Nano-Oscillators—seeks to harness Kagome materials for the realization of energy-efficient, field-free spintronic nano-oscillators.
The first objective of KaSHNO is the growth of Kagome materials as efficient spin-current sources. Subsequently, device fabrication will enable the quantification of SOT using spin torque ferromagnetic resonance (STFMR) and 2nd harmonis Hall volatge (HHV) techniques, with an emphasis on disentangling the origin of the torques. The next stage focuses on fabricating SHNO devices and probing their oscillatory behavior both electrically and optically (via Brillouin light scattering). Mutual synchronization and field-free auto-oscillations will then be explored. Finally, voltage gating will be employed to achieve scalable, energy-efficient auto-oscillations for applications in neuromorphic computing and microwave technologies.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2025-PF

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Coordinator

GOETEBORGS UNIVERSITET
Net EU contribution
€ 252 180,00
Address
VASAPARKEN
405 30 Goeteborg
Sweden
Region
Södra Sverige Västsverige Västra Götalands län
Activity type
Higher or Secondary Education Establishments
Links
Total cost
No data