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Find the equilibrium value at temperature τ of the fractional

  1. Feb 5, 2012 #1
    1. The problem statement, all variables and given/known data

    Find the equilibrium value at temperature τ of the fractional magnetization

    M / (Nm) = 2<s> / N

    of the system of N spins each of magnetic moment m in a magnetic field B. The spin excess is 2s. Take the entropy as the logarithm of the multiplicty g(N,s) where

    σ(s) ≈ σo − (2s^2)/N

    where
    σo = ln(g(N,0))
    and g is the multiplicity function.

    2. Relevant equations



    3. The attempt at a solution

    I don't understand what I'm being asked. What do they mean by the equilibrium value?
     
  2. jcsd
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