Size-Specific Spin Configurations in Single Iron Nanomagnet: From Flower to Exotic Vortices.
basic_science · Level V
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- Record sourced from PubMed, PMID 26407034.
- Also identified by DOI 10.1021/acs.nanolett.5b02892.
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Abstract
The different spin configurations in the vicinity of the single-domain/vortex transition are reported in isolated magnetic nanoparticles. By combining chemical synthesis, electron holography in a dedicated transmission electron microscope and micromagnetic simulations, we establish the "magnetic configurations vs size" phase diagram of Fe single-crystalline nanocubes. Room temperature high resolution magnetic maps reveal the transition between single-domain and vortex states for Fe nanocubes from 25 to 27 nm, respectively. An intermediate spin configuration consisting of an ⟨111⟩ vortex is for the first time evidenced.