Publication de Maxime Barbier et Thierry Ouisse

Ici vous trouverez l'article de Maxime Barbier et Thierry Ouisse :
"We report muon spin rotation (μSR) and neutron diffraction on the rare-earth-based magnets ${\left({\mathrm{Mo}}_{2/3}R{E}_{1/3}\right)}_2\mathrm{AlC}$, also predicted as parent materials for two-dimensional (2D) derivatives, where the rare earth (RE) = Nd, Gd (only μSR), Tb, Dy, Ho, and Er. By crossing information between the two techniques, we determine the magnetic moment ($m$), structure, and dynamic properties of all compounds. We find that only for RE = Nd and Gd the moments are frozen on a microsecond timescale. Out of these two, the most promising compound for a potential 2D high $m$ magnet is the Gd variant, since the parent crystals are pristine with $m=6.5\pm 0.5{\mu }_B$, Néel temperature of $29\pm 1K$, and the magnetic anisotropy between out-of- and in-plane coupling is smaller than ${10}^{-8}$. This result suggests that magnetic ordering in the Gd variant is dominated by in-plane magnetic interactions and should therefore remain stable when exfoliated into 2D sheets."