Ferroelectric charge order stabilized by antiferromagnetism in multiferroic LuFe${}_{2}$O${}_{4}$

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Ferroelectric charge order stabilized by antiferromagnetism in multiferroic LuFe $_{2}$ O $_{4}$

A. M. Mulders, M. Bartkowiak, J. R. Hester, E. Pomjakushina, and K. Conder

Phys. Rev. B 84, 140403(R) – Published 3 October 2011

Abstract

Neutron diffraction measurements on multiferroic LuFe $_{2}$ O $_{4}$ show changes in the antiferromagnetic (AFM) structure characterized by wave vector $q = (\frac{1}{3} \frac{1}{3} \frac{1}{2})$ as a function of electric field cooling procedures. The increase of intensity from all magnetic domains and the decrease in the two-dimensional (2D) magnetic order observed below the Néel temperature are indicative of increased ferroelectric charge order (CO). 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 three-dimensional charge order.

Received 8 August 2011

DOI:https://doi.org/10.1103/PhysRevB.84.140403

Authors & Affiliations

A. M. Mulders¹, M. Bartkowiak^1,2, J. R. Hester², E. Pomjakushina³, and K. Conder³

¹The University of New South Wales in Canberra, Canberra, Australian Capital Territory 2600, Australia.
²The Bragg Institute, Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales 2234, Australia
³Laboratory for Development and Methods, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

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Vol. 84, Iss. 14 — 1 October 2011

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