= Stoner criterion
{wiki=Stoner_criterion}
The Stoner criterion is a concept in solid-state physics that provides a condition for the onset of ferromagnetism in materials. It is named after the physicist Edmund C. Stoner, who formulated it in the context of electron spin and magnetic properties in metals. The Stoner criterion can be expressed using the density of states at the Fermi level and the exchange interaction parameter, which reflects the strength of the interaction between electrons with opposite spins.
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