Nanocrystalline multiferroic BiFeO3 ultrafine fibers by sol-gel based electrospinning

被引:93
作者
Xie, S. H. [1 ,2 ]
Li, J. Y. [3 ]
Proksch, Roger [4 ]
Liu, Y. M. [3 ]
Zhou, Y. C. [1 ,2 ]
Liu, Y. Y. [1 ,2 ]
Ou, Y. [1 ,2 ]
Lan, L. N. [1 ,2 ]
Qiao, Y. [5 ]
机构
[1] Xiangtan Univ, Minist Educ, Key Lab Low Dimens Mat & Applicat Technol, Xiangtan 411105, Hunan, Peoples R China
[2] Xiangtan Univ, Fac Mat Optoelect & Phys, Xiangtan 411105, Hunan, Peoples R China
[3] Univ Washington, Dept Mech Engn, Seattle, WA 98195 USA
[4] Asylum Res, Santa Barbara, CA 93117 USA
[5] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
基金
美国国家科学基金会;
关键词
bismuth compounds; electric domains; ferroelectric materials; ferromagnetic materials; grain size; multiferroics; nanostructured materials; nanotechnology; piezoelectricity; sol-gel processing;
D O I
10.1063/1.3040010
中图分类号
O59 [应用物理学];
学科分类号
摘要
Novel nanocrystalline BiFeO3 ultrafine fibers have been synthesized by sol-gel based electrospinning, with fiber diameter in the range of 100-300 nm and grain size of around 20 nm. Phase pure perovskite BiFeO3 can be obtained if the fibers are fired in Ar atmosphere, eliminating impurity phases often observed when fired in air or N-2 atmosphere. Excellent piezoelectricity and clear ferroelectric domain structure of the ultrafine fibers are characterized by high voltage piezoresponse force microscopy. Enhanced weak ferromagnetism arising from the nanocrystalline structure of ultrafine fibers is also observed.
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页数:3
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