Abstract
The magnetostatic energy due to the surface poles, the anisotropy, and the exchange energies within the Bloch walls is obtained for a specimen of which the magnetic domains consist of coplanar parallel strips arranged periodically with alternate polarity. The sum of these energies per unit area of the specimen surface is examined numerically, taking into account the saturation magnetization, the wall width, the domain width, and the thickness of the specimen. The surface density of the sum of the energies is found to become a minimum at certain values of the domain width and the thickness. A relation between the domain width and the thickness which give the minimum energy density is in good agreement with the experimental results obtained for ferrites of the magnetoplumbite type.
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