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. Author manuscript; available in PMC: 2018 Jan 31.
Published in final edited form as: Chem Rev. 2015 Aug 10;115(19):10690–10724. doi: 10.1021/cr500698d

Figure 10. Size and shape dependent magnetization.

Figure 10

(a) As the particle size increases, the relative effect of canted spins on the particle surface decreases, which results in an increase of net magnetization. The thickness of the scanted spin layer is ∼0.9 nm for spherical Fe3O4 MNPs. (b) Cubic MNPs assume higher saturation magnetization than spherical particles, because the cubic geometry allows more spins to align in the same direction of the applied magnetic fields. Reproduced with permission from Refs. 111 and 114. Copyright 2011 2012 American Chemical Society.