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.