Currently, not only electric vehicle, but also gasoline-powered vehicles are equipped with various electronic devices such as vehicle navigation systems, electronic toll collection systems, and trip recorders. Electronic devices may malfunction or fail due to the effects of electromagnetic noise generated by various electrical products and electronic devices. High-frequency electromagnetic waves can be reflected by electromagnetic shielding materials such as copper and aluminum. However, low-frequency electromagnetic waves, which are easily generated by motors and other devices, are difficult to shield. We have developed a new additive for nickel-iron alloy plating to produce low-frequency electromagnetic wave shielding layers.