Charge Order in LuFe2O4: Antiferroelectric Ground State and Coupling to Magnetism

被引：111

作者：

Angst, M. ^{[1
,2
]}

Hermann, R. P. ^{[2
,3
]}

Christianson, A. D. ^{[4
]}

Lumsden, M. D. ^{[4
]}

Lee, C. ^{[5
]}

Whangbo, M. -H. ^{[5
]}

Kim, J. -W. ^{[6
]}

Ryan, P. J. ^{[6
]}

Nagler, S. E. ^{[4
]}

Tian, W. ^{[1
,6
]}

Jin, R. ^{[1
]}

Sales, B. C. ^{[1
]}

Mandrus, D. ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[2] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

[3] Univ Liege, Dept Phys, B-4000 Sart Tilman Par Liege, Belgium

[4] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

[5] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA

[6] Ames Lab, Ames, IA 50010 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.101.227601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

X- ray scattering by multiferroic LuFe2O4 is reported. Below 320 K, superstructure reflections indicate an incommensurate charge order with propagation close to (1/3 1/3 3/2). The corresponding charge configuration, also found by electronic structure calculations as most stable, contains polar Fe= O double layers with antiferroelectric stacking. Diffuse scattering at 360 K, with (1/3 1/3 0) propagation, indicates ferroelectric short- range correlations between neighboring double layers. The temperature dependence of the incommensuration indicates that charge order and magnetism are coupled.

引用

页数：4

共 22 条

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