Manipulating the shape of flexible magnetoelastic nanodiscs with meron-like magnetic states

TL;DR

This paper explores how magnetic states called merons influence the shape and curvature of flexible magnetoelastic nanodiscs, revealing how magnetic topology and mechanical parameters control their deformation.

Contribution

It demonstrates the role of meron winding number and magnetic polarity-chirality connection in determining nanodisc curvature and shape, advancing understanding of magnetoelastic device control.

Findings

Meron winding number determines the sign of the nanodisc's curvature.

Increasing radius, thickness, or Young's modulus reduces the maximum curvature.

Shape depends on the magnetic polarity and chirality relationship.

Abstract

The control of the magnetic properties of shapeable devices and the manipulation of flexible structures by external magnetic fields is a keystone of future magnetoelectronics-based devices. This work studies the elastic properties of a magnetoelastic nanodisc that hosts a meron as the magnetic state and can be deformed from structures with positive to negative Gaussian curvature. We show that the winding number of the hosted meron is crucial to determine the curvature sign of the stable obtained shape. Additionally, we show that the optimum curvature reached by the nanodisc depends on geometrical and mechanical parameters. It is shown that an increase in the external radius, thickness, and Young's modulus lead to a decrease in the optimum curvature absolute value. Finally, it is shown that the nanodisc's shape also depends on the connection between the polarity and chirality of the vortex-like meron.