  Imaging of nanoscale magnetic textures within extended material systems is of
critical importance both to fundamental research and technological
applications. Whilst high resolution magnetic imaging of thin nanoscale samples
is well-established with electron and soft X-ray microscopy, the extension to
micrometer-thick systems with hard X-rays currently limits high resolution
imaging to rare-earth magnets. Here we overcome this limitation by establishing
soft X-ray magnetic imaging of micrometer-thick systems using the pre-edge
phase X-ray Magnetic Circular Dichroism signal, thus making possible the study
of a wide range of magnetic materials. By performing dichroic
spectro-ptychography, we demonstrate high spatial resolution imaging of
magnetic samples up to 1.7 {\mu}m thick, an order of magnitude higher than
conventionally possible with absorption-based techniques. This new regime of
magnetic imaging makes possible the study of extended non rare-earth systems
that have until now been inaccessible, from magnetic textures for future
spintronic applications to non-rare-earth permanent magnets.
