What is field attenuation? This is also known as the shielding factor (S) and is a ratio of the magnetic field strength outside of the magnetic shield (Ha) and the resultant field on the inside of the shield ie Ha/Hi (no units) or S = 20 x log(Ha/Hi) (Db). There are various formula based on [...]
Mumetal ® is one of a family of three Nickel-Iron alloys widely used to produce magnetic parts and shielding. The three alloys concerned have the following approximate compositions and well known trade names:- 36%NiFe widely known as Supra 36, Nilomag36, Radiometal 36, Magnifer36 50%NiFe widely known as Supra 50, Nilomag 50, Radiometal 50, Magnifer 50 80%NiFe [...]