EBS-enabled magnetic BCDI of domains in Sr2IrO4

Bragg coherent diffraction imaging (BCDI) uniquely enables the study of small crystalline samples with high strain sensitivity (~2 × 10−4) and high spatial resolution (~10 nm) in three-dimensions (3D). Here we propose to use BCDI to image magnetic domains within a single crystal of Sr2IrO4, a high-temperature superconductor (HTSC) analogue. We plan to image the (106) magnetic Bragg peak to observe the evolution of 3D antiferromagnetic (AFM) domains in real space, complemented by collecting normal charge (116) Bragg peaks below and above TN = 225K. The two peaks will provide information on how magnetic domains evolve as a function of temperature, and how they are pinned to any defects in the lattice or are confined by the crystal morphology. This experiment will study the evolution of 3D magnetic domains and domain walls to understand fundamental magnetic interactions that make iridates analogous to superconducting cuprates.