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.

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.