Oxygen-vacancy effect on structural, magnetic, and ferroelectric properties in multiferroic YMnO3 single crystals

被引:20
作者
Chen, D. P. [1 ]
Du, Y. [1 ]
Wang, X. L. [1 ]
Cheng, Z. X. [1 ]
Dou, S. X. [1 ]
Lin, Z. W. [2 ]
Zhu, J. G. [2 ]
Xu, B. [3 ]
机构
[1] Univ Wollongong, Inst Superconducting & Elect Mat ISEM, Wollongong, NSW 2522, Australia
[2] Univ Technol Sydney, Fac Engn & Informat Technol, Ultimo, NSW 2007, Australia
[3] Shandong Janzhu Univ, Sch Mater Sci Engi, Jinan 250101, Shandong, Peoples R China
基金
澳大利亚研究理事会;
关键词
D O I
10.1063/1.3676000
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have investigated the structural, magnetic, and ferroelectric properties of magnetically frustrated multiferroic YMnO3 single crystals. The ferroelectric domain structures of YMnO3 samples were studied by piezoresponse force microscopy. Instead of domain vortex structure in stoichiometric crystals, YMnO3-delta exhibits a random domain configuration with straight domain walls. In magnetic measurements, the YMnO3-delta crystal shows typical antiferromagnetic behavior with higher Neel temperature and lower magnetization compared to the stoichiometric sample. The ordered oxygen vacancies dominate multiferroicity through tailoring the domain wall structure. (C) 2012 American Institute of Physics. [doi:10.1063/1.3676000]
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页数:3
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