Microstructure and multiferroic properties of BaTiO₃/CoFe₂O₄ films on Al₂O₃/Pt substrates fabricated by electrophoretic deposition

详细信息    查看全文

• 作者：Gang Jian^a ; ^b ; ^{jiangang456@126.com} ; Dongxiang Zhou^b ; ^{dxzhou@mail.hust.edu.cn} ; Junyou Yang^c ; Hui Shao^a ; Fei Xue^b ; Qiuyun Fu^b
• 关键词：Electrophoretic deposition ; Multiferroic ; Nano-particles ; Magnetic and electro-magnetic characterization
• 刊名：Journal of the European Ceramic Society
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：33
• 期：6
• 页码：1155-1163
• 全文大小：1400 K

文摘

BaTiO₃/CoFe₂O₄ bilayer films on high temperature resistant Al₂O₃/Pt substrates were fabricated using the electrophoretic deposition (EPD) method. Powder synthesis, suspension preparation and kinetics of deposition were investigated in detail. Two different sintering temperatures were tested and the resultant microstructure and properties of ceramic films were investigated. The composite films sintered at a temperature of 1200 ¡ãC/2 h yielded optimal microstructures and properties. The obtained bilayer films had a dense structure with no phase diffusion or passive layer. Besides to ferroelectric and magnetic properties, magnetoelectric (ME) coupling properties were also confirmed by the magnetic anisotropy and magnetic field induced polarization investigation. The composite films showed a increased P_s from 16.2 to 16.85 ¦ÌC/cm² with variations ¦¤P_s of 4 % when the magnetic field was applied in parallel direction and a decreased P_s from 16.2 to 14.9 ¦ÌC/cm² with variations ¦¤P_s of ?8 % when a normal direction field was applied.