We varied the composition and sintering temperature of Sr-La-Co ferrite magnets to analyze the effects of various important factors on coercivity (HcJ). We examined the effects of crystal grain size and distribution, the mechanism of magnetization reversal, the degree of crystal grain orientation (OD), and the anisotropy field (HA) onHcJ. We proposed an equation based on the experimental results that expresses the measuredHcJand considers these effects asHcJ=Ct(0.4/Rh) OD (HA-Hd-Hin), whereCt,Rh,Hd, andHinare the crystal grain size effects onHcJof sintered magnet, rotational hysteresis integral corresponding to the mechanism of magnetization reversal, demagnetizing field of shape anisotropy, and interaction field between crystal grains, respectively. We found that apart from the volume ratio for single-domain crystal grains andHA, the mechanism of magnetization reversal had significant effects onHcJfor Sr-La-Co sintered ferrite magnets.
No takes yet. Share an insight, caveat, or question.
Nishio et al. (2009) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: