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Collins Concise English Dictionary © HarperCollins Publishers:: ferromagnetism /ˌfɛrəʊˈmæɡnɪˌtɪzəm/ n - 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 domains
ferromagnetic /ˌfɛrəʊmæɡˈnɛtɪk/ adj fer•ro•mag•net•ic (fer′ō mag net′ik),USA pronunciation adj. [Physics.]- Physicsnoting or pertaining to a substance, as iron, that below a certain temperature, the Curie point, can possess magnetization in the absence of an external magnetic field; noting or pertaining to a substance in which the magnetic moments of the atoms are aligned. Cf. antiferromagnetic, diamagnetic, ferrimagnetic, paramagnetic.
- ferro- + magnetic 1840–50
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