Efficiency of Magnetostatic Protection Using Nanostructured Permalloy Shielding Coatings Depending on Their Microstructure

The effect of microstructure on the efficiency shielding or shunting magnetic flux by permalloy shields was investigated in present work. For this purpose, FeNi coatings with different grain structures were obtained using stationary and pulsed electrodeposition. coatings’ composition, crystal structure, surface microstructure, domain studied. It has been shown that 0.2–0.6 µm grains have a disordered structure. Consequently, higher value achieved, but working range too limited. reason for is probably hindered movement boundaries. Samples nanosized an ordered two-domain structure permissible partial transition to superparamagnetic state regions size less than 100 nm. small domain, coexistence ferromagnetic regions, although they reduce maximum efficiency, significantly expand nanostructured coatings. As result, dependence between magnetostatic found.