The study of magnetic properties, coercivity mechanism and bending strength of hot-deformed RE-Fe-B magnets

• The optimal comprehensive magnetic properties are obtained at 13.09 at% RE.
• The bending strength with different rare earth content is determined.
• Domain wall moved irreversibly when the external field gets close to the coercivity.
• Inhomogeneous domain wall pinning should be the dominant coercivity mechanism.

The effect on mechanical properties and magnetic properties of hot-deformed magnets with different rare earth (RE) content has been investigated. The results show that the optimal comprehensive magnetic properties are obtained at 13.09 at% RE. The bending strength parallel to c-axis orientation increases with the increasing of RE content, while that perpendicular to c-axis orientation exhibits decrease. Moreover, the micro magnetic structure was observed and the coercivity mechanism of the hot-deformed magnet sample was discussed.