Local field of magnetic islands: role of their shape

TL;DR

This paper investigates how the shape of micro- and nano-magnetic islands affects their local magnetic field distribution, highlighting that elliptical and diamond shapes produce more localized and stronger fields than rectangular ones, with implications for spin trap design.

Contribution

It provides a detailed analysis of the influence of island shape on magnetic field localization, emphasizing the advantages of elliptical and diamond shapes for spin trapping applications.

Findings

Elliptical and diamond-shaped islands produce more localized magnetic fields.

Elliptical islands generate larger induced magnetic fields.

Shape influences the effectiveness of magnetic islands in spin trap applications.

Abstract

I analyze in details distribution of local magnetic field induced by micro- and nano-magnets. I consider three kinds of elongated magnetic islands: ellipse-, diamond- and rectangular shaped islands which were magnetized uniformly along long axis. This report concentrates on the role of their shape upon distribution of the field. Calculations show that unlike rectangular-shaped magnet, ellipse-shaped and diamond-shaped ones produce much more localized field in proximity of its magnetic poles. Additionally in the case of ellipse-shaped islands the magnitude of induced field is large. This two facts favor arrays of ellipse-shaped magnetic islands to build zero-dimensional spin traps in a hybrid based on Ferromagnet/Semiconductor structure.