Neutron Diffraction Investigations of Magnetism in BiFeO3 Epitaxial Films

被引：42
|
作者：
Ratcliff, William, II [1 ]
Kan, Daisuke [2 ]
Chen, Wangchun [1 ]
Watson, Shannon [1 ]
Chi, Songxue [1 ]
Erwin, Ross [1 ]
McIntyre, Garry J. [3 ]
Capelli, Sylvia C. [3 ]
Takeuchi, Ichiro [2 ]
机构：
[1] NIST Ctr Neutron Res NCNR, Gaithersburg, MD 20899 USA
[2] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA
[3] Inst Laue Langevin, F-38042 Grenoble 9, France
来源：
ADVANCED FUNCTIONAL MATERIALS | 2011年 / 21卷 / 09期
关键词：
THIN-FILMS; ENHANCED POLARIZATION; TEMPERATURE;
D O I：
10.1002/adfm.201002125
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The recovery of a modulated magnetic structure in epitaxial BiFeO3 thin films as revealed by neutron diffraction is reported. The magnetic structure in thin films is found to strongly depend on substrate orientation. The substrate orientation causes different strain-relaxation processes resulting in different thin-film crystal structures. The (110) oriented film with a monoclinic structural phase has a single-domain modulated magnetic structure where the magnetic moment lies in the HHL plane. For the (111) oriented film that has a rhombohedral structure, a modulated structure superimposed on the G-type antiferromagnetic order is found. These results indicate that slight structural modifications in the BiFeO3 thin film cause drastic changes in the magnetic structure.
引用
收藏
页码：1567 / 1574
页数：8
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