Dielectric and magnetoelectric characterization of CoFe2O4/Sr0.5Ba0.5Nb2O6 composites

被引：32
|
作者：
Chen, XM [1 ]
Tang, YH
Chen, IW
Xu, ZC
Wu, SY
机构：
[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China
[2] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
[3] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 3210027, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2004年 / 96卷 / 11期
关键词：
D O I：
10.1063/1.1809771
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetoelectric composites were created through incorporating dispersed CoFe2O4 ferromagnetic grains into a Sr0.5Ba0.5Nb2O6 relaxor ferroelectric matrix. The two phases are chemically compatible and coexist in the dense, sintered composites. Unlike other relaxors, the Sr0.5Ba0.5Nb2O6-containing composites can be electrically poled. The apparent dielectric constant is enhanced by the conductivity in the ferrite phase and the space charge at the phase interface. A significant magnetoelectric effect was observed in all compositions investigated, with a maximum dE/dH value of 24.8 mV/cm/Oe obtained for 0.4CoFe(2)O(4)/0.6Sr(0.5)Ba(0.5)Nb(2)O(6), which is much greater than that of magnetoelectric compounds and solid solutions. These results demonstrate that the Pb-free (Sr,Ba)Nb2O6 relaxor can be advantageously used as the matrix for ferromagnetic/ferroelectric composites in the future development of magnetoelectric materials. (C) 2004 American Institute of Physics.
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收藏
页码：6520 / 6522
页数：3
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