All-magnetic slabs and Multiferroism in (Bi2-xO2)(MF4) Aurivillius oxyfluorides, (M= Fe, Ni)
hal.structure.identifier | Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS] | |
dc.contributor.author | MENTRÉ, Olivier | |
hal.structure.identifier | Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS] | |
dc.contributor.author | JUÁREZ-ROSETE, Miguel | |
hal.structure.identifier | Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS] | |
dc.contributor.author | COLMONT, Marie | |
hal.structure.identifier | Institut Laue-Langevin [ILL] | |
dc.contributor.author | RITTER, Clemens | |
hal.structure.identifier | CELLS ALBA synchroton = ALBA Synchrotron [CELLS ALBA] | |
dc.contributor.author | FAUTH, François | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | DUTTINE, Mathieu | |
hal.structure.identifier | Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS] | |
dc.contributor.author | HUVÉ, Marielle | |
hal.structure.identifier | Plateforme en Imagerie Cellulaire et Tissulaire [PICT] | |
dc.contributor.author | TERRYN, Christine | |
hal.structure.identifier | Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS] | |
dc.contributor.author | DUFFORT, Victor | |
hal.structure.identifier | Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS] | |
dc.contributor.author | ARÉVALO-LÓPEZ, Angel | |
dc.date.issued | 2022 | |
dc.identifier.issn | 0897-4756 | |
dc.description.abstractEn | The Aurivillius layered compounds with predominant fraction of paramagnetic transition metals are an emerging playground for discovery of magnetoelectric or multiferroic compounds. This aim was recently achieved by incorporating Fanions in the perovskite layer of the (Bi2O2)(CoF4) compound, only described so-far in a disordered model (unit cell : ap, ap, c). Here we report the investigation on the representative compounds (Bi2O2)(MF4) (M = Fe, Ni) using single crystal, synchrotron, neutron and electron diffraction. These reveal that the crystallographic average cell (2xap, 2xap, c) is orthorhombic, polar and accompanied by versatile (in)commensurate modulations. The supercell model was fully refined for (Bi2-xO2)(FeF4) (q = (0, ½, 0)) in the P2111 polar space group with transverse Fe-displacements relative to q. Bi-deficiency is compensated by a mixed Fe 2.5+ valence, but, the ideal stoichiometry is preserved for (Bi2O2)(NiF4). Both compounds are antiferromagnetic below TN = 89 K (Fe) and 45 K (Ni) with moments lying in the (ac) plane and a weak ferromagnetic component along the b-axis. DFT calculations validate a strongly anisotropic distribution of magnetic exchanges (Jab/Jc > 10). A broad anomaly on the dielectric constant at TN and a polarization loop at room temperature were obtained on (Bi2-xO2)(FeF4) single crystals, revealing multiferroism with magneto electric couplings. | |
dc.language.iso | en | |
dc.publisher | American Chemical Society | |
dc.title.en | All-magnetic slabs and Multiferroism in (Bi2-xO2)(MF4) Aurivillius oxyfluorides, (M= Fe, Ni) | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1021/acs.chemmater.2c01213 | |
dc.subject.hal | Chimie/Matériaux | |
bordeaux.journal | Chemistry of Materials | |
bordeaux.page | 5706–5716 | |
bordeaux.volume | 34 | |
bordeaux.issue | 12 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-03783310 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-03783310v1 | |
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