Charge Order, Dynamics, and Magnetostructural Transition in Multiferroic LuFe2O4

被引：112

作者：

Xu, X. S. ^{[1
]}

Angst, M. ^{[2
,3
]}

Brinzari, T. V. ^{[1
]}

Hermann, R. P. ^{[3
,4
]}

Musfeldt, J. L. ^{[1
]}

Christianson, A. D. ^{[2
]}

Mandrus, D. ^{[2
,5
]}

Sales, B. C. ^{[2
]}

McGill, S. ^{[6
]}

Kim, J. -W. ^{[7
]}

Islam, Z. ^{[8
]}

机构：

[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

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

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

[5] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA

[6] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[7] Ames Lab, Ames, IA 50010 USA

[8] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

来源：

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

关键词：

D O I：

10.1103/PhysRevLett.101.227602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigated the series of temperature and field-driven transitions in LuFe2O4 by optical and Mossbauer spectroscopies, magnetization, and x-ray scattering in order to understand the interplay between charge, structure, and magnetism in this multiferroic material. We demonstrate that charge fluctuation has an onset well below the charge ordering transition, supporting the "order by fluctuation" mechanism for the development of charge order superstructure. Bragg splitting and large magneto-optical contrast suggest a low-temperature monoclinic distortion that can be driven by both temperature and magnetic field.

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页数：4

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