2D to 3D Magnetism in Synthetic Micas
Fe-based mica minerals usually display two opposing magnetic ground states, either they behave as spin-glasses or as layered ferrimagnets. No definite reason has been proposed as an explanation for this duality. This conundrum is unraveled by comparing the synthetic micas KFe<sub>3</sub>[MGe<sub>3</sub>]O<sub>10</sub>X<sub>2</sub> with M═Fe and Ga, X═OH<sup>-</sup> and F<sup>-</sup>. Neutron diffraction demonstrates a 2D to 3D magnetic transition in KFe<sub>3</sub>[FeGe<sub>3</sub>]O<sub>10</sub>(OH)<sub>2</sub> while just hints or no order at all are observed for the fluorides with M═Fe and Ga respectively. The 3D transition is triggered by the presence of iron in the intralayer tetrahedra. DFT+U calculations show that the magnetic exchange couplings between the previously believed solely magnetic octahedral layers would otherwise be frustrated without this intralayer iron.
Authors
- Óscar Fabelo (ORCID: https://orcid.org/0000-0001-6452-8830)
- Claire Minaud (ORCID: https://orcid.org/0000-0002-5750-4854)
- Olivier Mentré (ORCID: https://orcid.org/0000-0002-1822-6003)
- C. Ritter (ORCID: https://orcid.org/0000-0003-3674-3378)
- Ángel M. Arévalo‐López (ORCID: https://orcid.org/0000-0002-8745-4990)
- J.L. Rosas-Huerta (ORCID: https://orcid.org/0000-0002-8870-0313)
- Jonas Wolber (ORCID: https://orcid.org/0009-0005-3385-5528)
Institutions
- Rutherford Appleton Laboratory (GB)
- Centre National de la Recherche Scientifique (FR)
- École Nationale Supérieure de Chimie de Lille (FR)
- Université de Lille (FR)
- Research Complex at Harwell (GB)
- Institut Laue-Langevin (FR)
- Unité de catalyse et de chimie du solide de Lille (FR)
- École Centrale de Lille (FR)
Publication Details
- Journal
- Advanced Science
- Published
- 2024-09-20
- DOI
- https://doi.org/10.1002/advs.202408266
- Citations
- 1
- Primary Topic
- Advanced Condensed Matter Physics
- Type
- article
- Field-Weighted Citation Impact
- 0.31
Funders
- Secretaría de Educación Pública
- Indo-French Centre for the Promotion of Advanced Research
- Secretaría de Estado de Ciencia, Tecnología e Innovación
- Institut Chevreul