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ferromagnetic

[fer-oh-mag-net-ik]
adjective Physics.
  1. 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 magnetic field; noting or pertaining to a substance in which the magnetic moments of the atoms are aligned.
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Origin of ferromagnetic

First recorded in 1840–50; ferro- + magnetic
Related formsfer·ro·mag·ne·tism [fer-oh-mag-ni-tiz-uh m] /ˌfɛr oʊˈmæg nɪˌtɪz əm/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for ferromagnetism

ferromagnetism

noun
  1. 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 domainsCompare diamagnetism, paramagnetism See also magnet, Curie-Weiss law
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Derived Formsferromagnetic (ˌfɛrəʊmæɡˈnɛtɪk), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ferromagnetism

ferromagnetic

adj.

1840, from ferro- "iron" + magnetic.

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Online Etymology Dictionary, © 2010 Douglas Harper

ferromagnetism in Science

ferromagnetism

[fĕr′ō-măgnĭ-tĭz′əm]
  1. 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.
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Related formsferromagnetic adjective (fĕr′ō-măg-nĕtĭk)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.