The trouble is, I want a material that can absorb an electric field (because i have a material with a very high magnetic permeability and i don't want a magnetic field ) but the electric field outside the "box" (i am thinking of making a box made of the electric shielding material with the magnetic material inside it) is very high, and i don't want the electric field magnetizing the electric shielding (which is likely to be magnetized because the electric field is very high).