On the magnetic structure of iron

TLDR: In this paper, the magnetic free energy of a ferromagnetic crystal is composed of the energy of magnetic anisotropy, which is the energy connected with magnetostriction deformation of the body.

Abstract: Publisher Summary A ferromagnetic crystal in the non-magnetized state consists of separate regions of spontaneous magnetization, each of which is magnetized to saturation. The magnetic free energy of a ferromagnetic crystal is composed of the energy of magnetic anisotropy. The energy connected with magnetostriction deformation of the body should also be taken into account in cubic crystals. It should be determined from the minimum condition of the total energy for a given orientation of the layers, after which the most advantageous orientation of the layers themselves with respect to the coordinate planes has to be determined from the same condition. The width of the layers, however, is found to be inexpressible explicitly in the general case. In regard to the experimental data on the ferromagnetic structure of iron, quite a large number of investigations are available in which this structure was studied by the well-known method of ferromagnetic powders or colloids.