2026-06-01T21:50:45Z https://icatplus.esrf.fr/oaipmh/request

oai:icatplus.esrf.fr:inv/2064081197 2025-04-29T08:11:04.011Z

4.2 EI 10.15151/ESRF-ES-2064081197 Nathan YUTRONKIE Nathan Yutronkie 0000-0002-8297-9376 Matthias OPEL Matthias Opel 0000-0003-4735-9574 Matthias OPEL Matthias Opel 0000-0003-4735-9574 Monika SCHEUFELE Monika Scheufele 0000-0003-2071-7263 Monika SCHEUFELE Monika Scheufele 0000-0003-2071-7263 BENEDIKT EGGERT Benedikt Eggert 0000-0001-7739-3541 BENEDIKT EGGERT Benedikt Eggert 0000-0001-7739-3541 Johanna FISCHER Johanna Fischer 0000-0001-8617-7314 Johanna FISCHER Johanna Fischer 0000-0001-8617-7314 BAPTISTE VALLET-SIMOND Baptiste Vallet-Simond Miina LEIVISKÄ Miina Leiviskä Miina LEIVISKÄ Miina Leiviskä Stephan GEPRAEGS Stephan Gepraegs Stephan GEPRAEGS Stephan Gepraegs Katharina OLLEFS Katharina Ollefs 0000-0002-2301-4670 Example Institute 2028 Data from large facility measurement 2025-04-23T06:00:00Z/2025-04-28T06:00:00Z 2025-04-28T06:00:00Z I CC-BY-4.0 We propose to investigate the uniaxial magnetic anisotropy and its temperature-dependent sign change (Morin transition) in epitaxial thin films of the prototypical antiferromagnet alpha-Fe2O3. The scenario is well established in bulk with a Morin transition temperature of 263 K, in thin films it is still a matter of debate. However, a deeper understanding is mandatory because of its interplay with the Dzyaloshinsky-Moriya interaction (DMI) between the Fe3+ moments, important for correctly describing the spin-Hall magnetoresistance (SMR) and its unexpected large amplitude as well as the magnon Hanle effect and its nonreciprocal behavior. The DMI breaks the inversion symmetry and leads to a finite canting of the antiferromagnetic sublattices, resulting in a tiny macroscopic magnetic moment in the (0001) plane. We will record the XMCD of this moment and the XMLD of the Néel order to quantify the DMI, to determine the Fe3+ canting angle, and to pinpoint the Morin transition temperature.