A sample of paramagnetic salt at a temperature T = 1 K is in a magnetic field with induction B = 0.1 T. What will be the temperature of the sample after its adiabatic demagnetization, if in the corresponding range of parameters the free energy of the salt can be taken equal to F = -AT4/(a + B)2, where A and a are constants, and a = 10-4 T?

Answer. Format gif