Pure Magnetic Bragg Ptychography imaging of the spin texture in the complex oxide antiferromagnet Sr2IrO4

Magnetic Bragg ptychography can surpass established SAXS geometry magnetic Coherent Diffraction Imaging methods (holography, ptycho-tomography) in the additional possibility to reveal local crystalline strain and also extend to antiferromagnetic materials. As opposed to SAXS geometry, which provides no contrast to antiferromagnetic domains textures, Bragg geometry provides this sensitivity from the pure and separate (from structural) antiferromagnetic Bragg peaks. Therefore, for the development of magnetic Bragg ptychography high flux hard X-rays are essential. This proposal is only feasible due to the ESRF EBS, together with the 10K cryostat and coherent X-ray nanobeam implemented on ID01. This experiment will perform magnetic Bragg ptychography using a pure magnetic scattering Bragg reflection. This will greatly aid the development of our adapted inversion algorithms, to include the vectorial nature of the magnetic scattering cross-section.