Shape Effect of Magnetic Nanoelements as Biomolecular Labels for Magnetic Biosensors

Abstract

Four magnetic nanoelements of different shapes were investigated at varying distances from a permalloy nanowire to see how the shape of the nanoelements affected the resultant demagnetizing field from the nanoelements onto the nanowire. All results were simulated using micromagnetic simulations by Object Oriented Micromagnetic Framework (OOMMF). It is shown that the square nanoelements performed the best and that the shape anisotropy has an important role in determining the external demagnetizing field for nanoelements.