Question

When the thermodynamic system includes only the medium and not the magnetic field, the work is expressed as dW=μ0*hdm, if the volume change of the magnetic medium is ignored, the basic thermodynamic equation of the magnetic medium is U =TDS+μ0*hdm. try to deduce the relationship between the temperature t of the magnetic medium and the magnetic field intensity H when the magnetic field is reduced under the adiabatic condition.

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