coercivity

詳細解釋：

co.er.civ.i.ty

n.（名詞）
The intensity of the magnetic field needed to reduce the magnetization of a ferromagnetic material to zero after it has reached saturation.
矯頑力：磁場的強度，為在強磁性的物質達到飽和之後，把它的磁化作用縮小到零所必需