10.1.2 Magnetization Reversal

When a single elliptical particle is initially magnetized parallel to its long axis, which is also the remanent state due to the shape anisotropy, it requires an (antiparallel) external field of 239 kA/m to reverse its magnetization. The magnetization reversal process is very inhomogeneous (cf. Fig. 10.2).

Figure 10.2: Snapshot of the magnetization reversal process of a single particle.