Title of Presentation

Ultra-low field switching in a dipolar-coupled pair of magnetic nano-spheres, and related geometries, using Mumax-3

Type of Submission

Pre-recorded Poster

Research Field

Physics

Faculty Advisor

Narendra K. Jaggi

Graduation Year

2022

Start Date

10-4-2021 8:00 AM

End Date

11-4-2021 5:00 PM

Abstract

Field-induced magnetization reversal has been thoroughly used for information storage in hard-disks, magnetic memory, and logic devices. Here, we observe the magnetization reversal of two spherical nanoparticles, also called Stoner particles. We used a GPU-accelerated micromagnetics simulation software called mumax3 to study the magnetic switching of these particles at a separation distance that is perpendicular to the anisotropy axes. The external field is applied antiparallel to the anisotropy axes. We have studied the magnetic switching for different values of separation distances, and we observe a general decrease in the external field required for switching as the distance decreases. However, at a critical distance of 23nm, we observed an ultralow magnetic switching field strength. Then the field increases sharply.

Our simulations show a general trend that agrees with the available data for nano-spheres and nano-discs.

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Apr 10th, 8:00 AM Apr 11th, 5:00 PM

Ultra-low field switching in a dipolar-coupled pair of magnetic nano-spheres, and related geometries, using Mumax-3

Field-induced magnetization reversal has been thoroughly used for information storage in hard-disks, magnetic memory, and logic devices. Here, we observe the magnetization reversal of two spherical nanoparticles, also called Stoner particles. We used a GPU-accelerated micromagnetics simulation software called mumax3 to study the magnetic switching of these particles at a separation distance that is perpendicular to the anisotropy axes. The external field is applied antiparallel to the anisotropy axes. We have studied the magnetic switching for different values of separation distances, and we observe a general decrease in the external field required for switching as the distance decreases. However, at a critical distance of 23nm, we observed an ultralow magnetic switching field strength. Then the field increases sharply.

Our simulations show a general trend that agrees with the available data for nano-spheres and nano-discs.