Ferroelectric charge order stabilized by antiferromagnetism in multiferroic LuFe2O4

Details Ferroelectric charge order stabilized by antiferromagnetism in multiferroic LuFe2O4 Ferroelectric charge order stabilized by antiferromagnetism in multiferroic LuFe2O4

2011-09-27

arxiv.org/abs/1109.5762v1

PRB 84 (2011) 140403(R)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.84.140403

Neutron diffraction measurements on multiferroic LuFe2O4 show changes in the antiferromagnetic (AFM) structure characterized by wavevector q = (1/3 1/3 1/2) as a function of electric field cooling procedures. The increase of intensity from all magnetic domains and the decrease in the 2D magnetic order observed below the Neel temperature are indicative of increased ferroelectric charge order. The AFM order changes the dynamics of the CO state, and stabilizes it. It is determined that the increase in electric polarization observed at the magnetic ordering temperature is due to a transition from paramagnetic 2D charge order to AFM 3D charge order.

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