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Maximum value of magnetization of the system

by LagrangeEuler
Tags: magnetization, maximum
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LagrangeEuler
#1
Aug29-13, 11:38 AM
P: 310
Maximal value of magnetization of the system of ##N## atomic moments is
##M_s=Ng\mu_B J##
How this result is obtained? Some reference maybe?

In the case of localized feromagnetism in the mean-field approximation
##H=-\frac{J}{2}zN\vec{S}\cdot \langle \vec{S} \rangle \vec{S} \rangle##
and then in book Physics of magnetism and magnetic materials author uses
## \vec{S}=(g-1)\vec{J}##
What is a logic behind that?
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