Fig. 3: Magnetoresistance measurements before and after rolling the membranes.
From: Azimuthal anisotropy induced by partial flux-closure in self-assembled tubular permalloy membranes
a-i, b-i Self-assembled rolled-up and (c-i) rolled-down membranes. Inset in (a-i, b-i) shows magnetooptical Kerr images of magnetic domains in the membrane after rolling, and in (c-i), a cross-section image of the rolled-down membrane imaged using x-ray computed tomography. Schematic images of (a-ii, b-ii) rolled-up and (c-ii) rolled-down membranes, demonstrating the number of windings and possible magnetic domain orientations in tubular architectures. AMR hysteresis loops before and after rolling the membranes (a-iii, b-iii) upwards and (c-iii) downwards. Blue and yellow colors in the AMR loops indicate azimuthal and axial anisotropies, respectively, in the rolled membranes.
