ferromagnetism

铁磁性

ferromagnetism

the phenomenon exhibited by substances, such as iron, that have relative permeabilities much greater than unity and increasing magnetization with applied magnetizing field. Certain of these substances retain their magnetization in the absence of the applied field. The effect is caused by the alignment of electron spin in regions called domainsSee diamagnetism See paramagnetism See magnet See Curie-Weiss law