Metastable Crystalline Cobalt Iron Oxide Nano-Flakes with Antiferromagnetic/Ferrimagnetic Composition Mosaicity.

ABSTRACT: By thermal decomposition of a crystalline hydroxycarbonate precursor with a Co:Fe ratio of 2:1, crystals with alternating ferrimagnetic and antiferromagnetic nano-domains were synthesized using a facile synthetic approach that combined bottom-up co-precipitation of the precursor with a self-assembled top-down nano-structuring during spinel formation. Due to the miscibility gap of the spinel phase diagram at this composition, a topotactic segregation into CoFe₂O₄-like and Co₃O₄-like domains takes place at 400 °C, giving rise to porous crystalline nano-flakes with spatial compositional fluctuations on a scale of approximately 5 nm. Experimental methods and density functional theory showed that the metastable nature of this interface-rich material i

SUBMITTER: Rabe A 

PROVIDER: S-EPMC12643331 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature