Verify this result. By Taylor expansion, analyze the precise from of m for temperatures near 2Dj/KB and show that the critical exponent β  in this mean filed theory has the value ½. Show that at T =...

Verify this result. By Taylor expansion, analyze the precise from of m for temperatures near
2Dj/KB
and show that the critical exponent
β
 in this mean filed theory has the value ½. Show that at
T
= 0, the mean field theory for the spontaneous magnetization yields m =+1.