Fig. 1: 2D microscopic and magnetic characterisation of a giant spearhead magnetofossil.
From: Magnetic vector tomography reveals giant magnetofossils are optimised for magnetointensity reception
a Scanning electron microscopy image of the ‘no-stalk’ spearhead giant magnetofossil (red arrow) surrounded by detrital particles. b Example 3D model of the particle used in micromagnetic simulations. c–h 2D projections of the phase (upper panel) and the phase XMCD signal (lower panel) obtained using pre-edge dichroic ptychography32. The X-ray beam is normal to the plane of the images (along x) and has an energy of 706 eV, 4.5 eV below the observed peak of the absorption edge. For the magnetic images, blue and red colours correspond to magnetisation projections into and out of the plane of the diagram, respectively. 2D projections are shown for three rotation angles about axes approximately parallel to y (c–e) and z (f–h). Scale bar in (c–h) 500 nm.
