Effect of preparation conditions on magnetoelectric properties of CoFe2O4-BaTiO3 magnetoelectric composites

被引：39
|
作者：
Duong, Giap V.
Groessinger, R.
机构：
[1] Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria
[2] Hanoi Univ Technol, Fac Chem Engn, Hanoi, Vietnam
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 316卷 / 02期
基金：
奥地利科学基金会;
关键词：
magnetoelectric effect; multiferroic composite; preparation condition; barium titanate; cobalt ferrite;
D O I：
10.1016/j.jmmm.2007.03.142
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The preparation conditions affect the microstructure of the samples and influence the coupling between the magnetostrictive and piezoelectric phases in magnetoelectric composites. In this work, the optimum conditions for preparing CoFe2O4 - BaTiO3 core - shell structure magnetoelectric composites were investigated. For pressing the composite powders, an optimum pressure of 6 tons/cm (2) was found. For the sintering process, to sinter the sample at 1250 degrees C for 4 h was best suited. By changing the preparation conditions, the magnetoelectric effect ( ME) coefficients of the studied samples may change 20 times, from 0.18 to 3.53 and 0.1 to 2.23 mV/cm Oe for longitudinal and transverse measurements, respectively. This shows the preparation conditions, which mean that the microstructure plays an important role for the magnetoelectric effect in CoFe2O4- BaTiO3 magnetoelectric composites. (c) 2007 Published by Elsevier B. V.
引用
收藏
页码：E624 / E627
页数：4
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