Magnetism of thin polycrystalline nickel nanowires

The magnetism of one-dimensional (1D) nanowires is still unclear. The absence of experimental results on magnetic structures and microstructure of nanowires hampers their applications. In this paper, the magnetism of nanowires is studied by comparing the microstructures and simulating the M-H loops of two kinds of electrodeposited nickel nanowires of identical shape. In contrast to the existing views, it was found that the size distributions and interactions of grains within nanowires are the origin of the difference in magnetism. The magnetism of nanowires is affected deeply by the grains in nanowires.