The effect of an external magnetic field on the dealloying process of the Ni-Al alloy in alkaline solution.

Our work investigates the effect of an external magnetic field on different dealloying stages of the formation of a nanoporous magnetic material. The magnetic field first prolongs the Ni rearrangement process at a low magnetic flux density, whereas the trend is reversed and the Ni rearrangement process is shortened at a higher magnetic flux density. The much finer morphology of nanoporous Ni can be prepared by adjusting the external magnetic flux density.