Ferroelectric charge order stabilized by antiferromagnetism in multiferroic LuFe2O4

被引：24
|
作者：
Mulders, A. M. [1 ]
Bartkowiak, M. [1 ,2 ]
Hester, J. R. [2 ]
Pomjakushina, E. [3 ]
Conder, K. [3 ]
机构：
[1] Univ New S Wales, Canberra, ACT 2600, Australia
[2] Australian Nucl Sci & Technol Org, Bragg Inst, Lucas Heights, NSW 2234, Australia
[3] Paul Scherrer Inst, Lab Dev & Methods, CH-5232 Villigen, Switzerland
来源：
PHYSICAL REVIEW B | 2011年 / 84卷 / 14期
关键词：
D O I：
10.1103/PhysRevB.84.140403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Neutron diffraction measurements on multiferroic LuFe2O4 show changes in the antiferromagnetic (AFM) structure characterized by wave vector 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 two-dimensional (2D) magnetic order observed below the Neel 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.
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页数：5
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