ABSTRACT
This chapter is concerned with the magnetism of organic solids, in general, and with the development of organic ferromagnets. It deals with the magnetic properties of simple organic radical crystals and polymer solids. Most derivatives of nitronyl nitroxide are quite stable radicals in the solid state. Polymers having organic stable radicals such as galvinoxyl and phenyl NN as pendants have been prepared by polymer chemists using chains properly designed for transmission of magnetism on the basis of topological spin polarization theory. The design of polymers having radical units within polymer chains is also in progress at several laboratories. Magnetic substances may be classified into two main types; the first is insulators, in which the electrons are mainly localized on a chemical entity which constitutes the substance. The second is conductors in which the electrons responsible for the magnetism are mobile throughout the substance.
