Observation of Coherent Spin Waves in a Three-Dimensional Artificial Spin Ice Structure.

ABSTRACT: Harnessing high-frequency spin dynamics in three-dimensional (3D) nanostructures may lead to paradigm-shifting, next-generation devices including high density spintronics and neuromorphic systems. Despite remarkable progress in fabrication, the measurement and interpretation of spin dynamics in complex 3D structures remain exceptionally challenging. Here, we take a first step and measure coherent spin waves within a 3D artificial spin ice (ASI) structure using Brillouin light scattering. The 3D-ASI was fabricated by using a combination of two-photon lithography and thermal evaporation. Two spin-wave modes were observed in the experiment whose frequencies showed nearly monotonic variation with the applied field strength. Numerical simulations qualitatively reproduced the observed modes. The

SUBMITTER: Sahoo S 

PROVIDER: S-EPMC8289297 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature