Magnetic Bragg ptychography imaging of strain and magnetiostriction spin texture tuning in Tb3Fe5O12 epitaxial thin film Spin Seebeck device

Spin Seebeck effect (SSE) has received notoriety for the next generation of magnetic device applications, with on-chip spintronic and thermoelectric functionalities. Understanding how crystal structure and strain are intertwined with the magnetic structure in devices is a crucial question underpinning SSE nanotechnology. This enigma could be resolved today thanks to the EBS upgrade, which provides sufficient hard X-ray coherent flux to develop the required tools. We are pioneering a novel 3D magnetic Bragg ptychography microscopy to reveal precisely how crystalline strain causes the magnetic spin texture tuning, in technologically relevant SSE prototype devices structures. This proposal builds on our preliminary results from experiment HC-4336, which have demonstrated the feasibility of obtaining magnetic ptychography reconstructions from the unique experiment set-up provided by ID01. We now require more beamtime to bring the quality of these results towards high impact publication.