P. Tenaud

TL;DR: In this paper, a simple model was proposed, where magnetization reversal is initiated in a volume equal to the activation volume and is determined by the formation of a domain wall, and magnetic viscosity measurements were obtained for ferrite and rare-earth transition-metal sintered magnets.

TL;DR: In this article, the intrinsic activation energy of Nd-Fe-B sintered magnets was derived at different fields between 4.2 and 300 K. At a given temperature, the viscosity S (H ) and the irreversible susceptibility χ irr were found to be proportional.

TL;DR: In this article, some of the magnetic measurements which appear to be most meaningful are described and their implications with respect to physical processes involved are discussed. But their exact mechanisms are not well understood.

TL;DR: In this article, the angular dependence of coercivity in sintered magnets is analyzed within the framework of a model for magnetization reversal described previously, where the coercive field is much weaker than the anisotropy field, i.e. only the projection of the field along the magnetization is effective.

TL;DR: In this article, a kink in negative fields appears in the hysteresis loops of Nd•Fe•B permanent magnets, which is caused by the spin reorientation occurring in the Nd2Fe14B phase and the incomplete alignment of the particles in the magnets.