Pressure-Induced Structural Transition in LuFe2O4: Towards a New Charge Ordered State

Jérôme Rouquette (1) , Julien Haines (1) , Ali Al-Zein (1, 2) , Philippe Papet (1) , Françoise Damay (3) , Julie Bourgeois (3, 4) , Tahar Hammouda (5) , Fabrice Doré (5) , Antoine Maignan (4) , Maryvonne Hervieu (4) , Christine Martin (4)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 LCVN - Laboratoire des colloïdes, verres et nanomatériaux
3 LLB - UMR 12 - Laboratoire Léon Brillouin
4 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
5 LMV - Laboratoire Magmas et Volcans

The electronic ferroelectric lutetium ferrite (LuFe2O4) was studied by x-ray diffraction as a function of pressure. Pressure is shown to induce an irreversible rhombohedral to orthorhombic transition leading to a supercell determined by the combination of electron and synchrotron x-ray diffraction. This new configuration is proposed to be charge ordered in agreement with the results of resistivity measurements.

Mots clés: LuFe2O4; multiferroic; Pressure; Charge order; Phase transition

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Jérôme Rouquette, Julien Haines, Ali Al-Zein, Philippe Papet, Françoise Damay, et al.. Pressure-Induced Structural Transition in LuFe2O4: Towards a New Charge Ordered State. Physical Review Letters, 2010, 105 (23), pp.237203. ⟨10.1103/PhysRevLett.105.237203⟩. ⟨hal-00545406⟩