Controllable Synthesis of Rare-Earth Based Permanent Magnetic Nanomaterials and Their Magnetic Properties

随着现代器件小型化和集约化的要求,对传统稀土永磁材料提出了更高的要求,包括高磁能积、高饱和磁感应强度等,而纳米技术的发展为实现该要求提供了途径.近年来,交换耦合效应为新一代综合磁性能优异的稀土永磁纳米材料的制备提供了新的思路.主要介绍了稀土永磁纳米材料的合成方法,主要包括液相化学法和其他一些常用的制备方法,比较了不同材料的磁学性能,总结了稀土永磁材料的最新进展和存在的挑战,同时展望了其未来的发展方向.With the development of device miniaturization and intensive application requirements,it is expected for traditional rare earth materials to give larger magnetic energy product,higher saturation induction intensity and so on.The progress of nanotechnology provides a new way to meet this demand.In recent years,exchange-coupled effect has been employed to prepare rare earth permanent magnets with better magnetic properties.In this review,we mainly summarized the synthesis method of rare earth permanent nanomagnets,including liquid phase method and other common process,and compared the magnetic properties of these nanosized magnets.We also presented the challenge and perspectives of rare earth permanent nanomagnets.国家自然科学基金项目中国科学引文数据库(CSCD)5466-4744