【摘要】 多铁性材料由于其不但具有单一的铁性（如铁电性、铁磁性和铁弹性）,而且由于铁性的耦合协同作用,会产生一些新的效应,使其可广泛应用于换能器、传感器、敏感器、多态存储等高技术领域。而氧化物基单相/复相陶瓷及其薄膜材料（如BiFeO₃,铁氧体/锆钛酸铅等）,由于其良好的铁磁、铁电性能,正成为磁电材料的研究热点。本文综合介绍了几种单相、复合磁电陶瓷、薄膜材料的制备,论述了材料的显微结构与磁电性能之间的关联,并指出了该类材料存在的问题和今后的发展方向。单相磁电材料至今还没能应用到实际中,主要是因为大部分单相材料的Neel或Curie温度较低,在很低的温度下才有磁电效应,磁也转换系数随着温度升高到室温而趋于零。具有低漏导的BiFeO₃薄膜（具有高的Curie温度）将具有铁电应用,但作为多铁性应用,还需解决弱的磁电耦合性。虽然复合磁电材料性能比单相材料性能好,但是仍然存在一些问题。磁电多铁性材料具有潜在的巨大的商业应用前景,已使其成为新的研究热点。更多还原

【Abstract】 Multiferroic materials have not only single ferroelectric,ferromagnetic and ferroelastic properties,but also multiferroic coupling effects,which lead to new effects.These coupling effects give these materials the potential for a wide range of applications; they can have many uses,such as energy transducers,sensors,and actuators.Now single oxides or composites and related thin films （e. g.,BiFeO₃ and ferrite/PZT） have attracted broad attention due to their coexisting ferromagnetic and ferroelectric properties.In this paper,we discuss the relationship between the microstructure and magnetoelectric properties,and describe some problems and further development issues in this research field.Due to the low Neel or Curie temperature for single phase magnetoelectric materials,they exhibit a magnetoelectric effect only at low temperatures and disappear at room temperature,and thus cannot be used in practical. BiFeO₃ thin films have a high Curie temperature,and will have further applications if the electrical properties and coupling effects can be enhanced.Although magnetoelectric composite materials have better performance than single magnetoelectric materials,there are still some issues to be resolved.Multiferroic materials have recently become a common research topic due to their potentially wide application.更多还原