2026-07-01T18:43:12Z https://icatplus.esrf.fr/oaipmh/request

oai:icatplus.esrf.fr:inv/2348957651 2026-04-19T06:00:27.573Z

4.2 EI 10.15151/ESRF-ES-2348957651 Marisel DI PIETRO MARTÍNEZ Marisel Di Pietro Martínez 0000-0001-9270-0546 Rajatava MUKHOPADHYAY Rajatava Mukhopadhyay 0000-0001-7613-2841 Virginie CHAMARD Virginie Chamard Marisel DI PIETRO MARTÍNEZ Marisel Di Pietro Martínez 0000-0001-9270-0546 Guillaume BEUTIER Guillaume Beutier 0000-0001-6064-0139 Rajatava MUKHOPADHYAY Rajatava Mukhopadhyay 0000-0001-7613-2841 Ugwumsinachi OJI Ugwumsinachi Oji Ugwumsinachi OJI Ugwumsinachi Oji Alexis WARTELLE Alexis Wartelle 0000-0003-0544-5247 Irene CALVO Irene Calvo 0000-0002-3448-9831 Ugwumsinachi OJI Ugwumsinachi Oji Irene CALVO Irene Calvo 0000-0002-3448-9831 Alexis WARTELLE Alexis Wartelle 0000-0003-0544-5247 Guillaume BEUTIER Guillaume Beutier 0000-0001-6064-0139 Virginie CHAMARD Virginie Chamard Example Institute 2029 Data from large facility measurement 2026-04-14T06:00:00Z/2026-04-19T06:00:00Z 2026-04-19T06:00:00Z I CC-BY-4.0 In helical antiferromagnets such as dysprosium, the magnetic structure is an helix incommensurate with the crystal lattice. Domains are therefore defined not only by the chirality of the magnetic helix, but also by its phase. While domains of the former can be evidenced using incoherent X-ray beams, coherence is necessary to evidence the latter. The situation is further complicated in diffraction by the overlap of charge and magnetic signals, which have different polarisations. We propose that Bragg ptychography, with a multimodal phase retrieval algorithm, can solve this difficulty and allow imaging such helical phase domains for the first time. Moreover, the measurements will provide simultaneously a microscopic view of the crystal structure. The relationship between heterogeneities of the crystal structure and the magnetic structure will provide fundamental insight about the phase degree of freedom of the magnetic structure.