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Adiabatic demagnetization of paramagnetic

  1. Dec 23, 2008 #1
    I can't solve the following problem:
    Paramagnetic is thermally insulated. Its magnetisation M depends on external magnetic field H and temperature T: [tex] M=\frac{a H}{T}[/tex], heat capacity at constant H is [tex]C_H=\frac{b}{T^2}[/tex] (a, b are constants). How will the temperature of the system change when H is quasi-statically reduced to 0. In order to have final temperature change by the factor of 2 from the initial temperature how strong should be the initial H.

    I know that I should find [tex]\left(\frac{\partial T}{\partial H} \right)_S [/tex] but I have no idea how to do it.

    Thanks for help,

    Pawel
     
  2. jcsd
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