In case of coercivity versus grain size dependence, however, two effects overlap: one valid for bulk materials and the other appearing when grain sizes approach the sizes of magnetic domains.

• 然而，一旦矫顽磁力依赖了粒径的尺度，将会出现两种效应的叠加：一种效应将在大块材料中出现，而其它效应则在粒径接近磁性域的尺度时出现。