coercivity; coercive force
Technical term in physics and materials science; the magnetic field strength needed to reduce magnetization to zero after saturation. Often contrasted with 抗磁力.
See also: 抗磁力
This magnet has high coercivity, so it is less affected by external magnetic fields.
Coercivity is one of the important properties of magnetic materials.
Compound of 保 (preserve) + 磁力 (magnetic force), likely a calque from English coercive force or German Koerzitivkraft.