Take a ferromagnetic conductor (with a non-zero $\vec{M}$ magnetization, regardless of $\vec{B}$). It is known that ferromagnetic materials can be partially demagnetized by a mechanical shock (for exemple, a magnet can be damaged if dropped). Then, the $\vec{B}$-field created by $\vec{M}$ should drop quickly after such a shock, and hence induce an electric field by $\vec{\nabla}\times\vec{E} = -\partial\vec{B}/\partial t$, and thus a current in the material.
Am I right, and were such currents observed experimentally ?
