Total entropy density of a general superconductor

Characterizing the energetic, electric and magnetic interactions occurring at the superconductivity by means of the method of extensive and intensive parameters, the total entropy density of a general superconductor has been determined. The resulting formula contains all possible superconducting effects and describes them separately with an additive term for each. The fundamental equation obtained can be applied for the individual special superconducting states by taking into consideration the particular terms corresponding to them.