f Geomagnetism and the Earth's Core

In a previous paper (Guerreiro, 1991) a MODEL was introduced to explain the liquid-to-solid transition in the earth's core. The assumption is that the outer electrons of the iron atoms jump from the valence to the conduction band leaving smaller and electrically stronger ions on the lattice. Among the consequences of that MODEL are: an easy explanation for the discontinuity of density in the outer core - inner core interface; the prediction that the electrical conductivity of the inner core must be considerably higher than that of the outer core; a strong argument against the naive statement that the inner core cannot support magnetization. That view reopens the question of the origin of the earth's magnetism. This paper goes a little further in the question of the origin of geomagnetism. It shows that the magnetic dipole moment of the earth accounts for only one part in seven thousand of the total moment that would be generated by the alignment of the elementary magnetic moments of all the iron atoms in the inner core. An interesting phenomenon, here named Thermoinertial Magnetism, is shown to exist in a hot rotating core, which is the source of a weak magnetic dipole field aligned in the rotation axis. This is one of the basic ingredients necessary for the setup of magnetization: a preferred direction in space in relation to which the elementary electronic magnetic moments align via quantum effects. This paper presents some very interesting numbers related to the assumption of magnetization in the earth's inner core.