deduce the relation that show magnetic field as function of transition temperature
Answers
Answer:
There is considerable interest in the effects of magnetic fields on the properties of materials, and
also in magnetic phase transitions. This handout gives a brief discussion of these topics, which,
unfortunately, are largely omitted from the book by Kittel and Kroemer.
As discussed in class, the thermodynamic identity becomes, in the presence of a magnetic field,
dF = −S dT − M dB , (1)
where F is the free energy, B is the external magnetic field and M is the total magnetic moment of
the system, i.e. the integral of the magnetization over the sample. In what follows we will always
assume that the volume and number of particles is constant. From Eq. (1) we see that the free
energy should be expressed as a function of the external magnetic field and temperature so that
the derivative with respect to B (at constant T) gives the magnetization,
Explanation: