ferromagnetism

/ ˌfɛrəʊˈmæɡnɪˌtɪzəm; ˌfɛrəʊmæɡˈnɛtɪk /

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 domains Compare diamagnetism paramagnetism See also magnet Curie-Weiss law

ferromagnetism

/ fĕr′ō-măg′nĭ-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.
2. Compare diamagnetism

Derived Forms

• ferromagnetic, adjective

Example Sentences

In this model, when they increased the motility of the atoms, the repulsive forces between atoms rearranged them into an ordered state called ferromagnetism.

From Science Daily

"Chiral topological superconductivity requires three ingredients: superconductivity, ferromagnetism and a property called topological order. In this study, we produced a system with all three of these properties."

From Science Daily

While ferromagnetism is already well studied, fundamental research is increasingly interested in other forms of magnetism.

From Science Daily

“The experimental papers showing ferromagnetism were pretty convincing, and the new theories are also more carefully done.”

From Scientific American

With ferromagnetism understood as deriving from the alignment of the individual magnetic moments of atoms in a crystal, Dr. Anderson provided a quantum explanation for what had been the perplexing property of antiferromagnetism.

From Washington Post