Abstract
An effective-field theory (EFT) with correlations has been used to investigate magnetic hysteresis properties and soft/hard magnetic behaviors of an Ising-type multisegment 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 ( HC) and squareness ( Mr/ MS) 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.
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