Unusual behavior of the magnetization reversal in soft/hard multisegmented nanowires

Highlights: • We studied the hysteresis loops for multisegmented nanowires as a function of their length. • The reversal process considers the formation of some kind of vortices structures. • There are two well-defined behaviors, one for long wires and other for short wires. • In most of the studied systems the magnetization reversal process starts at the ends. • Short soft/hard/soft wires exhibit an unusual behavior of the coercivity as a function of the length. - Abstract: The magnetization reversal mechanisms in soft/hard multisegmented nanowires have been investigated using numerical simulations. In most of the studied systems the magnetization reversal process starts at the ends. However in short soft/hard/soft nanowires, the magnetization reversal process starts at the center of the wire, generating an unusual behavior of the coercivity as a function of the length.