Rare earth ferrites LuFe2O4±x polymorphism, polytypism and metastable phases

M. Hervieu (1) , F. Damay (2) , A. Maignan (1) , Christine Martin (1)

1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
2 LLB - UMR 12 - Laboratoire Léon Brillouin

This work is a compendium of the structural properties of layered LnFe2O4±x ferrites, focussed on recently discovered polymorphs and their transitions through five complex commensurate and incommensurate modulated structures. These phases are obtained varying the oxygen content (reversibly from O4.0 to O4.5) or applying high pressure (up to 15 GPa). The relationships between the different structures are discussed and models are proposed. These ferrites, which contain magnetic cations and exhibit remarkable 3D flexibility, open the road for magnetic, electric, catalytic or energy materials. © 2015 Elsevier Masson SAS. All rights reserved.

Mots clés: Layered ferrites; Polymorphism; Structural transitions

Domaines: Chimie; Cristallographie; Matériaux; Chimie théorique et/ou physique

M. Hervieu, F. Damay, A. Maignan, Christine Martin. Rare earth ferrites LuFe2O4±x polymorphism, polytypism and metastable phases. Solid State Sciences, 2015, 48, pp.A1-A16. ⟨10.1016/j.solidstatesciences.2015.07.013⟩. ⟨hal-02184143⟩