Electric field switching of antiferromagnetic domains in YMn2O5:: A probe of the multiferroic mechanism

被引：42
|
作者：
Radaelli, P. G. [1 ,2 ]
Chapon, L. C. [1 ]
Daoud-Aladine, A. [1 ]
Vecchini, C. [1 ,3 ]
Brown, P. J. [4 ]
Chatterji, T. [4 ]
Park, S. [5 ]
Cheong, S-W. [5 ]
机构：
[1] Rutherford Appleton Lab STFC, ISIS Facil, Didcot OX11 0QX, Oxon, England
[2] UCL, Dept Phys & Astron, London WC1E 6BT, England
[3] Fdn Res & Technol Hellas, Inst Elect Struct & Laser, Iraklion 71110, Crete, Greece
[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
[5] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.101.067205
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We employ neutron spherical polarimetry to determine the nature and population of the coexisting antiferromagnetic domains in multiferroic YMn2O5. By applying an electric field, we prove that reversing the electrical polarization results in the population inversion of two types of in-plane domains, related to each other by inversion. Our results are completely consistent with the exchange-striction mechanism of ferroelectricity, and support a unified model where cycloidal ordering is induced by coupling to the main magnetic order parameter.
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页数：4
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