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

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.