4.2 Hard magnetic materials
4.2 Hard magnetic materials
4.2 Hard magnetic materials
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
The coercivity of the hexagonal ferrites is limitted by nucleation; once a domain wall exists in a<br />
particle, it moves with ease through the particle under an applied field. However, wall motion<br />
does not appear to propagate from grain to grain. Thus, the coercivity of hexagonal ferrites can<br />
be described by the mechanism of single-domain particle magnetization with the magnetocrystalline<br />
anisotropy.<br />
Commercial ferrite magnets<br />
I (mT)<br />
400<br />
200<br />
0<br />
SW: Stoner-Wohlfarth model<br />
K 1 = 3.4610 5 J/m 3<br />
1.2: Anisotropic magnets<br />
3: Isotropic magnet
Change language