Spatial extent of the Dzyaloshinskii-Moriya interaction at metallic interfaces
| Autor: | William Legrand, Yanis Sassi, Fernando Ajejas, Sophie Collin, Laura Bocher, Hongying Jia, Markus Hoffmann, Bernd Zimmermann, Stefan Blügel, Nicolas Reyren, Vincent Cros, André Thiaville |
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| Přispěvatelé: | Unité mixte de physique CNRS/Thales (UMPhy CNRS/THALES), THALES [France]-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Solides (LPS), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany, ANR-10-LABX-0035,Nano-Saclay,Paris-Saclay multidisciplinary Nano-Lab(2010), ANR-17-CE24-0025,TOPSKY,Propriétés topologiques des skyrmions magnétiques et opportunitiés pour le dévelopement de nouveaux dispositifs spintroniques(2017), European Project: 824123,SKYTOP |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Physical review materials 6(2), 024408 (2022). doi:10.1103/PhysRevMaterials.6.024408 Physical Review Materials Physical Review Materials, 2022, 6 (2), pp.024408. ⟨10.1103/PhysRevMaterials.6.024408⟩ |
| ISSN: | 2475-9953 |
| DOI: | 10.1103/physrevmaterials.6.024408 |
| Popis: | International audience; We experimentally investigate the range of the Dzyaloshinskii-Moriya interaction (DMI) occurring at magnetic interfaces within metallic heterostructures. To this aim we perform Brillouin light scattering spectroscopy on a set of Co-based, asymmetric metallic heterostructures, incorporating atomically thin continuous films obtained by room-temperature sputtering, and of identical orientation and quality. We thus access to the intrinsic dependence of the interfacial DMI and other magnetic interactions on the thickness of the non-magnetic layer adjacent to Co, which is chosen among Pt, Ru and Au. Notably, we observe that a robust DMI is already generated by as few as two atomic planes of Pt, and that interfacial DMI can be efficiently suppressed by a dusting of Ru equivalent to a single atomic plane coverage. These results point directly towards a mechanism where DMI is generated within the two first atomic planes away from the interface, in agreement with first-principles calculations. This locally generated DMI is however likely to be modulated by more distant atoms in the case of strain effects. The short-range aspect of the interfacial DMI opens up the synthesis of dense magnetic multilayers, allowing for a strong interfacial DMI even with very thin layers, which can be further tuned by strain engineering. |
| Databáze: | OpenAIRE |
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