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3. Ceramic or hard ferrite materials
3.1 General
There are two types of magnetic ferrites: soft and hard:
the former, with their low coercive field strength, are used mainly in electronic applications, particularly at high frequencies (cf. in the Electronics treatise, article ) ;
the latter are used to manufacture ceramic magnets. Initially, these materials were studied in the 1950s by the Philips laboratories in Eindhoven
, whose work was based on the Stoner-Wohlfarth theory of monodomain fine grains[27] , according to which coercivity is proportional to anisotropy (see article...[1]
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Ceramic or hard ferrite materials