I would like to know whether there is any difference in Electromagnetic field and Magnetic field. I know their source but I'm curious to know whether they are different in nature? I also wants to know whether Magnetic Shield Material works same way on Electromagnetic or Electrical field? Can we shield the field 100%? e.g. If I have strong neo magnet of cube shape 1x1x1 inch of 1.4 T, can I enclose it using cubical shield? What would be thickness of shielding material for this case?