摘要
BaTiO 3 /CoFe 2 O 4 bilayer films on high temperature resistant Al 2 O 3 /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 °C/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 μC/cm 2 with variations Δ P s of 4% when the magnetic field was applied in parallel direction and a decreased P s from 16.2 to 14.9 μC/cm 2 with variations Δ P s of −8% when a normal direction field was applied.
危险品化学品经营许可证（带存储）