Effects of Geometry on Magnetic Reversal in Elongated Nanomagnets

Artificial spin ice systems consist of two-dimensional arrays of interacting nanomagnets and offer a rich platform for visualizing and studying collective magnetic behavior. In this study, we use micromagnetic simulations to investigate how the end geometry of elongated nanomagnets, arranged in a square lattice, influences magnetic reversal. By systematically altering the island shape from rectangular to elliptical, we analyze the hysteresis loops of both non-interacting and interacting elements. Our results show that modifying the island geometry impacts the reversal process due to an interplay between internal and external degrees of freedom. These findings provide a roadmap for understanding how nanomagnet geometry influences magnetic behavior and for tuning the island shape to achieve desired magnetic properties.