Author： Zinovik Mikhail Zinovik E.V.
Publisher： Springer Publishing Company
ISSN： 1068-1302
Source： Powder Metallurgy and Metal Ceramics, Vol.44, Iss.1-2, 2005-01, pp. : 66-74
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Abstract
We have formulated the requirements for ferrites that must be met to obtain rectangular and square hysteresis loops. We have studied the effect of micro-inhomogeneities on the rectangularity and squareness of the hysteresis loop. We have established a negative effect from α-Fe2O3 inclusions, local tetragonal distortions of the cubic lattice, and linear micro-inhomogeneities. We have shown that the general reason for the high degree of squareness of the hysteresis loop for ferrites of all compositions having a rectangular hysteresis loop is granulated micro-inhomogeneities with an elevated concentration of cationic vacancies relative to the matrix. We have studied the conditions for the formation of such inhomogeneities.
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