# Voltage Control of Magnetic Monopoles in Artificial Spin Ice

## TL;DR

This paper demonstrates a novel strain-mediated multiferroic method to locally control magnetic monopoles in artificial spin ice, enabling efficient manipulation with low energy at near resonance frequencies.

## Contribution

It introduces a new voltage-controlled approach to manipulate monopoles in artificial spin ice using strain-induced magnetic precession.

## Key findings

- Localized voltage control can move monopoles across lattice sites.
- Control is effective in CoFeB, Ni, and FeGa based ASI systems.
- Switching occurs at frequencies near ferromagnetic resonance with energies below 620 aJ.

## Abstract

Current research on artificial spin ice (ASI) systems has revealed unique hysteretic memory effects and mobile quasi-particle monopoles controlled by externally applied magnetic fields. Here, we numerically demonstrate a strain-mediated multiferroic approach to locally control the ASI monopoles. The magnetization of individual lattice elements is controlled by applying voltage pulses to the piezoelectric layer resulting in strain-induced magnetic precession timed for 180 degree reorientation. The model demonstrates localized voltage control to move the magnetic monopoles across lattice sites, in CoFeB, Ni, and FeGa based ASI$'$s. The switching is achieved at frequencies near ferromagnetic resonance and requires energies below 620 aJ. The results demonstrate that ASI monopoles can be efficiently and locally controlled with a strain-mediated multiferroic approach.

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Source: https://tomesphere.com/paper/1803.08598