Figure 4: Spin configurations at 5T.
From: Origin of reduced magnetization and domain formation in small magnetite nanoparticles
(a) [001] zone axis of a 10 nm nanoparticle without APBs, which has a single magnetic domain. (b) [001] zone axis of a 10 nm nanoparticle with a ¼a0 <110> APB, which leads to a coincident magnetic domain wall. The net magnetisations of the left and right part of the NP are labelled as MR and ML, respectively. (c) Magnified view of (b) near the APB plane showing the canting of the spins at the boundary. (d) 10 nm model with two non-coplanar APBs on <1 1-2> type planes, with net magnetization M> (along the field) and M< (in-plane) for the upper and lower part respectively. The colour coding is in RGB fashion where the function which determines the colour is dependent only on the projection of the spin direction along the applied field. Two limiting cases are pure blue (R = 0; G = 0; B = 1) for spins aligned along the field and pure red colour for spins in opposite direction. Net magnetization direction (determined by the FeB spins) in each of the domains helps identify the FeB sites.
