Hard X-ray Bragg Magnetic Ptychography Imaging of Magnetic Insulators: Exploiting the High EBS Coherence to Enable a New Regime in Nanomagn

The new ESRF-II EBS, with optimised hard X-ray brilliance, offers the potential to extend the developments of 3D ptychography methods to include magnetic materials, potentially opening up this field towards an entirely new user community. Of particular interest are nanoscale investigations of complex oxides, where magnetic, charge and lattice orders are entangled mesoscopic lengths scales to produce exotic physics of high Tc superconductors, multiferroics, Mott insulators etc. We have recently initiated a program aimed at realizing this goal, with pioneering experiments combining of X-ray nanoprobe and X-rays Resonant Scattering (XRS) techniques on Spin Seebeck ferrimagnets [1]. The uniqueness of this new microscopy is in revealing both the crystalline and magnetic nanostructure together in 3D, thus revealing how they are interrelated. In this proposal, we aim extend these studies to nanoscale complex oxides of the purely antiferromagnetic large spin-orbit Mott insulator Sr2IrO4.