24
CHAPTER 4. THE MAGNETICALLY ORDERED STATE
Combining this expression with Eq. (4.2.7) leads to

Upon substitution of
(Eq. 4.2.5) and
into Eq. (4.2.10), one
finds
This is quite an interesting result because it shows that for a given J the variation of
the reduced magnetization M(T)/M(0) with the reduced temperature
depends