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Artificial ferromagnetic nanofiber networks with new electronic, magnetic,mechanical and other physical properties can be prepared by electrospinning andmay be regarded as the base of bio-inspired cognitive computing units. For thispurpose, it is necessary to examine all relevant physical parameters of suchnanofiber networks. Due to the more or less random arrangement of thenanofibers and the possibility of gaining bent nanofibers in this productionprocess, elementary single nanofibers with varying bending radii, from straightfibers to those bent along half-circles, were investigated by micromagneticsimulations, using different angles with respect to the external magneticfield. As expected from the high aspect ratios and the resulting strong shapeanisotropy, all magnetization reversal processes took place via domain wallprocesses. Changing the cross-section from circular to a circle-segment or arectangle significantly altered the coercive fields and its dependence on thebending radius, especially for the magnetic field oriented perpendicular (90deg) to the fiber axes. In all three cross-sections, an angle of 45{\deg}between the fiber orientation and the external magnetic field resulted in thesmallest influence of the bending radius. The shapes of the longitudinal andtransverse hysteresis curves showed strong differences, depending oncross-section, bending radius and orientation to the magnetic field, oftendepicting distinct transverse magnetization peaks perpendicular to the fibersfor fibers which were not completely oriented parallel to the magnetic field.Varying these parameters thus provides a broad spectrum of magnetizationreversal processes in magnetic nanofibers and correspondingly scenarios for avariety of fiber-based information processing.

Magnetization reversal in bent nanofibers of different cross-sections