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فریت
Copper ferrite crystallizes in the cubic spinel structure; the hexagonal shape, deviating from the expected cubic form, is
obtained by adding surfactants to the solution from which the ferrite is precipitated [3].
This copper ferrite is ferrimagnetic with a relatively low energy of anisotropy.
Table 8.1 Constant of magnetic anisotropy K1 for different ferrimagnetic materials (ferrites).
rst approximation it may be assumed that ferrite nanoparticles with diameter d and a nonmagnetic surface layer of thickness d result in a magnetic active core with a diameter �d - 2d� [7].
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