Perspective of Fe₃O₄ Nanoparticles Role in Biomedical Applications

Figure 4

The schematic explanation of Fermi energy model of magnetic properties of materials. In (a) position, the up/down spins are located in balance states before applying external field. In (b) position, by applying external field, the energy state of aligned spins is higher than other ones; so, the magnetic properties are created [60].

(a)

(b)