摘要
The extension of 2D ferromagnetic structures into 3D curved geometry enables to tune its magnetic properties such as uniaxial magnetic anisotropy.Tuning the anisotropy with strain and curvature has become a promising ingredient in modern electronics,such as flexible and stretchable magnetoelectronic devices,impedance-based field sensors,and strain gauges,however,has been limited to extended thin films and to only moderate bending.By applying a self-assembly rolling technique using a polymeric platform,we provide a template that allows homogeneous and controlled bending of a functional layer adhered to it,irrespective of its shape and size.This is an intriguing possibility to tailor the sign and magnitude of the surface strain of integrated,micronsized devices.In this article,the impact of strain and curvature on the magnetic ground state and anisotropy is quantified for thinfilm Permalloy micro-scale structures,fabricated on the surface of the tubular architectures,using solely electrical measurements.
基金
funding by Fondecyt Iniciacion Grant No.11190184
funding from the German Research Foundation DFG (Gottfried Wilhelm Leibniz Prize granted in 2018,SCHM 1298/22-1 and KA5051/1-1 and KA5051/3-1)
the Leibniz Association (Leibniz Transfer Program T62/2019).
