A ferroelectric ceramic barium titanate (BaTiO₃, BT) layer and an interfacial agent polydopamine (PDA) as the shells are coated on the cobalt ferrite (CoFe₂O₄, CFO) nanoparticles successively to fabricate the interfacial compatibility of this magnetic oxide. Subsequently, the coated nanoparticles are compounded with ferroelectric poly(vinylidene fluoride-trifluoro ethylene) (P(VDF-TrFE)) matrix to obtain the [email protected]@PDA/(P(VDF-TrFE) magnetoelectric nanocomposite films. We find these nanocomposites with three phases including a CFO magnetic core, a BT piezoelectric shell and the P(VDF-TrFE) piezoelectric matrix show a considerable dielectric permittivity of 85.7 and a maximum polarization of 49.5 μC/cm². Attractively, after poling the saturated magnetization of this film increases from 52.1 emu/g to 61.7 emu/g, corresponding to a significant magnetoelectric effect. Through non self-consistent theory (NSC), the magnetoelectric coupling coefficient (α_E33) of [email protected]@PDA/(P(VDF-TrFE) film is calculated to reach 150.58 mV/cm·Oe, indicating that this flexible multiferroic film has a prospect of application on energy collector or new information storage devices.

依次将铁电陶瓷钛酸钡（BaTiO ₃，BT）层和界面剂聚多巴胺（PDA）作为外壳，依次涂覆在钴铁氧体（CoFe ₂ O ₄，CFO）纳米颗粒上，以制造该磁性氧化物的界面相容性。随后，将涂覆的纳米粒子与铁电聚偏二氟乙烯-三氟乙烯（P（VDF-TrFE））基质复合以获得[电子邮件保护] @ PDA /（P（VDF-TrFE）磁电纳米复合膜。包含CFO磁芯，BT压电壳和P（VDF-TrFE）压电基体的三相纳米复合材料显示出相当高的介电常数85.7和最大极化49.5μC/ cm ²。有吸引力的是，极化后，该膜的饱和磁化强度从52.1 emu / g增加到61.7 emu / g，这对应于显着的磁电效应。通过非自洽理论（NSC），磁电耦合系数（α _{Ë 33}）的[电子邮件保护] @ PDA /（P（VDF-TrFE）的重复膜被计算以达到150.58毫伏/厘米·奥斯特，表明这种灵活多铁性薄膜在能量收集器或新的信息存储设备上具有应用前景。