Some relationships between crystal textures and magnetic properties of alnico 8

Some relationships between crystal textures and their permanent magnet properties are reviewed on the basis of a homogeneous uniaxial anisotropic ferromagnet and a mosaic grain agglomerate in the commercial size of an Alnico 8 alloy. From the results obtained, it has been concluded that the highest energy might be obtained by control of the following two factors (besides the ordinary ones of composition, casting, and heat treatment): 1) the mean deviation angle of crystal axis should be within 18° of the magnetization direction; 2) the crystal grain should be below 3 pcs/10 mm along the magnet length.