Handling magnetic anisotropy and dynamic magnetic response of ferromagnetic multilayers in flexible substrates

TL;DR

This paper studies how external stress affects the magnetic properties of flexible ferromagnetic multilayers, highlighting their potential for use in sensitive stress and touch sensors.

Contribution

It demonstrates the tunability of magnetic anisotropy and dynamic response in flexible multilayers under stress, proposing their application in smart sensor devices.

Findings

High sensitivity of multilayers to external stress demonstrated

Magnetic response can be tuned by magnetic field, frequency, and magnetostriction

Potential application in flexible stress and touch sensors

Abstract

We investigate the dynamic magnetic response of ferromagnetic flexible NiFe/Ta and FeCuNbSiB/Ta multilayers under external stress. We explore the possibility of handling magnetic anisotropy and dynamic magnetic response of flexible magnetostrictive nanostructures. We quantify the sensitivity of the multilayers under external stress by calculating the ratio $|\Delta \textrm{MI}|/|\Delta \bar{\sigma}|$ and show that considerable values can be reached by tuning the magnetic field, frequency, magnetostriction constant, and external stress. The results reveal possibilities of application of flexible magnetostrictive multilayers under external stress and place them as very attractive candidates as element sensor for the development of sensitive smart touch sensors.