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[fer-oh-mag-net-ik] /ˌfɛr oʊ mægˈnɛt ɪk/

adjective, Physics.
noting or pertaining to a substance, as iron, that below a certain temperature, the Curie point, can possess magnetization in the absence of an external ; noting or pertaining to a substance in which the moments of the atoms are aligned.
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 Compare diamagnetism, paramagnetism See also magnet, Curie-Weiss law

1840, from ferro- “iron” + magnetic.
The property of being strongly attracted to either pole of a magnet. Ferromagnetic materials, such as iron, contain unpaired electrons, each with a small magnetic field of its own, that align readily with each other in response to an external magnetic field. This alignment tends to persists even after the magnetic field is removed, a phenomenon called hysteresis. Ferromagnetism is important in the design of electromagnets, transformers, and many other electrical and mechanical devices, and in analyzing the history of the earth’s magnetic reversals. Compare diamagnetism, paramagnetism.

ferromagnetic adjective (fěr’ō-māg-nět’ĭk)


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  • Ferromanganese

    [fer-oh-mang-guh-nees, -neez] /ˌfɛr oʊˈmæŋ gəˌnis, -ˌniz/ noun 1. a ferroalloy containing up to 90 percent . /ˌfɛrəʊˈmæŋɡəˌniːz/ noun 1. an alloy of iron and manganese, used in making additions of manganese to cast iron and steel

  • Ferromolybdenum

    [fer-oh-muh-lib-duh-nuh m, -mol-ib-dee-] /ˌfɛr oʊ məˈlɪb də nəm, -ˌmɒl ɪbˈdi-/ noun 1. a ferroalloy containing up to 60 percent . /ˌfɛrəʊmɒˈlɪbdɪnəm/ noun 1. an alloy of iron and molybdenum used in making alloy steels

  • Ferronickel

    [fer-oh-nik-uh l] /ˌfɛr oʊˈnɪk əl/ noun 1. a ferroalloy containing up to 45 percent . /ˌfɛrəʊˈnɪkəl/ noun 1. an alloy of iron and nickel used in making nickel steels

  • Ferroprotein

    ferroprotein fer·ro·pro·tein (fěr’ō-prō’tēn’, -tē-ĭn) n. Any of the proteins, such as heme or cytochrome, that contain iron in a prosthetic group.

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