Vortex magnetic field energy storage

Can magnetic vortex rings be used for energy-efficient data storage?

Phys. Rev. Lett. 132, 199902 (2024) Scientists have devised a promising method for generating and manipulating exotic spin patterns called magnetic vortex rings, which could have applications in energy-efficient data storage and processing. See more in Physics We need you to provide your credentials before accessing this content.

What is a magnetic vortex?

A magnetic vortex (1, 2) is one of the fundamental spin configurations occurring in thin micrometer-/nanometer-sized ferromagnetic disk elements due to the confinement of spins imposed by geometrical restrictions (2, 3).

Do magnetic vortex cores have a spin structure?

Their properties are strongly influenced by the spin structure in the vortex core. We have used spin-polarized scanning tunneling microscopy on nanoscale iron islands to probe for the first time the internal spin structure of magnetic vortex cores.

What are magnetic vortices?

Magnetic vortices are topological objects found in magnetic thin films and microstructures. The study of vortices has attracted much attention for their fundamental beauty and because vortices could be constituents of non-volatile storage and sensing devices as well as of radiofrequency and neuro-inspired devices.

What determines stray field energy of a vortex core?

The experimental data are compared with micromagnetic simulations. The results confirm theoretical predictions that the size and the shape of the vortex core as well as its magnetic field dependence are governed by only two material parameters, the exchange stiffness and the saturation magnetization that determines the stray field energy.

What is the difference between a magnetic vortex and a Vortice?

In comparison to vortices in meteorology, magnetic vortices are twelve orders of magnitude smaller. Schematics of the magnetization configuration of a a spiral skyrmion and b a magnetic vortex a Edge of a large permalloy rectangle observed by Kerr microscopy. The domains align along the edges.