Fig. 2: Strain-induced changes in uniaxial magnetic anisotropy and therefore in magnetic domains upon rolling planar magnetic (Ni78Fe22, positive magnetostriction) structures.
From: Self-assembly as a tool to study microscale curvature and strain-dependent magnetic properties
Polymeric platform (PP) before rolling for a rolled-down and b rolled-up fabrication. c Schematic images of magnetic domains in c-i disc, c-ii square, c-iii rectangle, and c-iv stripe structures in the planar state. d Kerr images of these four planar structures. Schematic image of the polymeric platform (with magnetic stripe and contact wires) after etching the sacrificial layer (SL) and e rolling down, and f rolling up. Kerr images of g rolled-down, and h rolled-up magnetic structures after ac-demagnetization in a field transverse to the induced anisotropy axis. Scale bars in d, g, h are 15 µm. The black and white arrows in the domains indicate the magnetization direction. The yellow and black arrows next to the Kerr images show the tensile and compressive strain (ε) direction.
