JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, vol.29, no.10, pp.2699-2704, 2016 (SCI-Expanded)
An effective-field theory (EFT) with correlations has been used to investigate magnetic hysteresis properties and soft/hard magnetic behaviors of an Ising-type multi-segment nanowire (IMN) with ferromagnetic/non-magnetic segment structure. The effects of the geometrical parameters on the magnetic hysteresis properties are studied in detail. Morphological dependence of the segmented nanowire is presented via segment thickness (l), wire thickness (d), and aspect ratio (AR) obtained from the exchange interactions. The coercive field (H-C) and squareness (M-r/M-S) of the IMN are also derived from hysteresis loops as a function of geometrical parameters. We find that the geometry has a significant effect on the magnetic characteristics of the nanowire. Comparisons between the observed theoretical results and some experimental works of nanowire arrays with hysteresis behaviors are made, and a very good agreement is obtained.