Material Characterization Study of Magnetite Nanocrystals for RF Sensing.

ABSTRACT: Magnetite nanocrystals show promise for electrically small gigahertz frequency applications, which could lead to miniaturizing transformer cores and new sensing technologies. This work presents a rigorous radiofrequency characterization of these nanocrystals using vector network analyzer (VNA) ferromagnetic resonance (FMR) measurements. For the first time, two different average diameters of Fe₃O₄ nanocrystals are investigated (7.3 and 20.2 nm). When the VNA-FMR results were compared to micromagnetic simulations, the magnetic anisotropy (K ₁) deviated from the ideal mean orientation value of K ₁/2 to K ₁/80 for the 7.3 nm nanocrystal. In contrast, the obtained magnetic anisotropy in 20.2 nm nanocrystals slightly dev

SUBMITTER: Sherburne MD 

PROVIDER: S-EPMC11465251 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature