ferromagnetism noun. [fɛrǝ(ʊ)'magnɪtɪz(ǝ)m] M19.
[from FERRO- + MAGNETISM.]
Orig., paramagnetism. Now, the form of magnetism shown by metallic iron, cobalt, and nickel, which is characterized by a large magnetic permeability and the phenomenon of hysteresis, and is associated with parallel alignment of the magnetic moments of neighbouring atoms.

[TahlilGaran] English Dictionary ▲