X-Ray Imaging and Multiferroic Coupling of Cycloidal Magnetic Domains in Ferroelectric Monodomain BiFeO3

被引：69

作者：

Johnson, R. D. ^{[1
,2
]}

Barone, P. ^{[3
]}

Bombardi, A. ^{[4
]}

Bean, R. J. ^{[5
]}

Picozzi, S. ^{[3
]}

Radaelli, P. G. ^{[1
]}

Oh, Y. S. ^{[6
,7
]}

Cheong, S. -W. ^{[6
,7
]}

Chapon, L. C. ^{[8
]}

机构：

[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[2] Rutherford Appleton Lab STFC, ISIS Facil, Didcot OX11 0QX, Oxon, England

[3] CNR, Ist Superconduttori Mat Innovat & Disposit CNR SP, I-67010 Coppito, Italy

[4] Diamond Light Source, Didcot OX11 0DE, Oxon, England

[5] UCL, CMMP, Dept Phys & Astron, London WC1E 6BT, England

[6] Rutgers Ctr Emergent Mat, Princeton, NJ 08540 USA

[7] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[8] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 21期

基金：

欧洲研究理事会; 英国工程与自然科学研究理事会;

关键词：

POLARIZATION;

D O I：

10.1103/PhysRevLett.110.217206

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic domains at the surface of a ferroelectric monodomain BiFeO3 single crystal have been imaged by hard x-ray magnetic scattering. Magnetic domains up to several hundred microns in size have been observed, corresponding to cycloidal modulations of the magnetization along the wave vector k = (delta, delta, 0) and symmetry equivalent directions. The rotation direction of the magnetization in all magnetic domains, determined by diffraction of circularly polarized light, was found to be unique and in agreement with predictions of a combined approach based on a spin-model complemented by relativistic density-functional simulations. Imaging of the surface shows that the largest adjacent domains display a 120 degrees vortex structure.

引用

页数：5

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