Magnetic field dependence of piezoelectric resonance frequency in CoFe₂O₄-BaTiO₃ composites

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• 作者：Isao Kagomiya^a ; ^{kagomiya@nitech.ac.jp} ; Yusuke Hayashi^a ; Ken-ichi Kakimoto^a ; Kazuyoshi Kobayashi^b
• 关键词：Simultaneous ferroelectric and ferromagnetic ; Multilayer composite ; Mechanical resonant frequency ; Magnetostriction ; CoFe2O4&ndash ; BaTiO3 composite
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2012
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：August, 2012
• 卷：324
• 期：15
• 页码：2368-2372
• 文件大小：746 K

摘要

The particulate and the multilayer CoFe₂O₄(CFO)-BaTiO₃(BT) composites were prepared by the conventional solid state reaction method and the tape casting method, respectively. Both the prepared composites were simultaneously ferroelectric and ferromagnetic at room temperature. For the multilayer composite sample, a piezoelectric resonance frequency remarkably depended on the applied DC magnetic field, while no remarkable magnetic field dependence was observed for the particulate composite samples. An uniform magnetostriction of the CFO phase in the multilayer composite contributes to piezoelectric effect of the BT phases, resulting in the modulation of the piezoelectric resonance frequency.