%0 Journal Article
%T High-pressure polymorph of LuFe2O4 with room-temperature antiferromagnetic order
%+ Laboratoire Léon Brillouin (LLB - UMR 12)
%+ Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM)
%+ Laboratoire de cristallographie et sciences des matériaux (CRISMAT)
%+ Institut Laue-Langevin (ILL)
%+ Synchrotron SOLEIL (SSOLEIL)
%+ Laboratoire Charles Coulomb (L2C)
%+ Laboratoire Magmas et Volcans (LMV-ENSMSE)
%A Damay, Françoise
%A Poienar, Maria
%A Hervieu, Maryvonne
%A Guesdon, Anne
%A Bourgeois, Julie
%A Hansen, Thomas
%A Haines, Julien
%A Elkaim, Eric
%A Hermet, Patrick
%A Konczewicz, Leszek
%A Hammouda, Tahar
%A Rouquette, Jerome
%A Martin, Christine
%< avec comité de lecture
%@ 1098-0121
%J Physical Review B: Condensed Matter and Materials Physics (1998-2015)
%I American Physical Society
%V 91
%P 214111
%8 2015-06-01
%D 2015
%R 10.1103/PhysRevB.91.214111
%K Ferroelectricity
%K System LuFe204
%K Structure refinement
%K Layered cobalt oxide
%K Metals
%K Transition
%K Charge
%K Coordination
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles
%X Branded for its potential electronic ferroelectricity, charge-ordered LuFe2O4 has a layered Fe triangular framework, whose topology is a source of degeneracy, both at the charge and spin levels. Here we present an in-depth characterization of LuFe2O4-hp, the high-pressure (hp) polymorph of LuFe2O4, using electron, x-ray, and neutron diffraction, combined with transport and magnetization measurements. We show that LuFe2O4-hp is characterized by a misfit-related monoclinic structure, accommodating a buckled triangular [Lu](infinity) layer and two shifted adjacent rectangular [Fe](infinity) planes belonging to a distorted rock salt-type layer. The release of the geometric frustration of the Fe magnetic lattice in the hp form leads to collinear antiferromagnetic ordering at T-N = 380 K. Possible coexistence of charge and magnetic orders in this material opens research pathways for the design of tunable multifunctional devices using high-pressure techniques.
%G English
%2 https://hal.science/hal-01203222/document
%2 https://hal.science/hal-01203222/file/damay2015.pdf
%L hal-01203222
%U https://hal.science/hal-01203222
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