Coercivity of SrFe 12 O 19 Hexaferrite Platelets Near Single Domain Size

The magnetization and coercivity of M-type strontium hexaferrite (SrFe12O19) platelets with diameters from 0.65 to 0.99 μm were measured at 300 K to investigate the intrinsic coercivity behavior near single domain size. The maximum intrinsic coercivity occurs at a platelet diameter of ~0.83 μm, which is close to the theoretical single domain size of 0.74 μm, while the magnetization slightly decrea...