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Jun 7, 2015 - Ferromagnetism is the basic mechanism by which certain materials (such as iron) form An everyday example of ferromagnetism is a refrigerator magnet used to hold measured in actinide ferromagnets PuP, NpFe2, and NpNi2" (PDF). Ferromagnetism – magnetic moments of atoms align to produce a strong magnetic effect. • For ferromagnetism, the Curie Law becomes ? = C/(T-Tc), where Tc is. On the basis of a many-electron quantum-mechanical model of a crystal, a calculation is made of the magnetic interaction of the electrons of a ferromagnetic. Ferromagnetism. • In free space, the flux density and magnetizing field strength are related by the expression. • µ. 0. =4? x 10-7 H.m-1, the permeability of. ferromagnetic. The only other type of magnetism observed in pure elements at room temperature is antiferromagnetism. Finally, magnetic materials can also be Ferromagnetism. (Refs.: Sections 10.6-10.7 of Reif; Book by J. S. Smart, Effective Field Theories of. Magnetism). Consider a solid consisting of N identical atoms Part I Foundation of Magnetism. 1 Basis of Magnetism. 3. 1.1 Basic Magnetic Laws and Magnetic Quantities. 3. 1.1.1. Basic Laws of Magnetic Forces, Magnetic Part I Foundation of Magnetism. 1 Basis of Magnetism. 3. 1.1 Basic Magnetic Laws and Magnetic Quantities. 3. 1.1.1. Basic Laws of Magnetic Forces, Magnetic The origin of these huge fields remained a mystery until Heisenberg introduced the idea of the exchange interaction in 1928. 1. Mean field theory. Page 3. Dublin