Field-variable magnetic domain characterization of individual 10 nm Fe<sub>3</sub>O<sub>4</sub> nanoparticles

Field-variable magnetic domain characterization of individual 10 nm Fe₃O₄ nanoparticles

Li Zheng-Hua¹, Li Xiang^{2, †}, Lu Wei³

Micromagnetic calculations. (a)–(c) Distribution of the spin configurations for the three situations highlighted by red arrows in the calculated hysteresis loop in (e). Panels (d) and (f) show the calculated MFM contrasts for the configurations shown in (a) and (c), respectively. (e) Calculated hysteresis loop for a single Fe₃O₄ nanoparticle.